Haverfordwest to Carmarthen

View a different levelling line: Aberdeen north to Aberdeen south (3GL) Aberdeen south to Laurencekirk (3GL) Aberdeen to Banchory (2GL) Aberdeen to Blair-Athol (1GL) Abergavenny to Brecon (2GL) Abergavenny to Brecon (3GL) Abergavenny to Suckley (3GL) Aberystwyth to Lampeter (3GL) Aberystwyth to Machynlleth (3GL) Achnasheen to Contin (3GL) Achnasheen to Ullapool (2GL) Achnasheen to Ullapool (3GL) Alfriston to Arundel (3GL) Alfriston to Croydon (2GL) Alfriston to Croydon (2GL) Alverstone Farm (IOW) to Godshill (IOW) (3GL) Arbirlot to St Andrews (3GL) Arbirlot to Tay Bridge (2GL) Arrochar to Bowling (2GL) Arrochar to Lochgilphead (3GL) Arundel to Alfriston (2GL) Arundel to Croydon (3GL) Arundel to Fareham (3GL) Arundel to Staines (1GL) Arundel to Staines (Branch Levelling to Weybridge Church &c.) (1GL) Arundel to Staines (Branch Levelling [from Fittleworth] to Coldwaltham Church, &c.,) (1GL) Arundel to Staines (Branch Levelling [from Petworth] to Pheasant Coppice Lodge) (1GL) Ayr to Dunlop (2GL) Ayr to Stranraer (3GL) Banchory to Rhynie (2GL) Basingstoke to Coventry (1GL) Basingstoke to Croydon (3GL) Basingstoke to Wallingford (2GL) Basingstoke to Wallingford (3GL) Beer to Bridford (3GL) Beer to Kingsbridge (3GL) Belford to Longhorsley (3GL) Berwick-upon-Tweed to Edinburgh (1GL) Berwick-upon-Tweed to Edinburgh (Branch Levelling from Belhaven to Bara Smithy) (1GL) Bettyhill to Reay (3GL) Birmingham to London (1GL) Birmingham to London (Branch Levelling from Daventry to Arbury Hill Trigonometrical Station, &c.) (1GL) Birmingham to London (Branch Levelling from Hockliffe to Milton Bryant Church) (1GL) Birmingham to London (Branch Levelling [from Coventry] to Foleshill and Sow Churches, &c.) (1GL) Birmingham to London (Branch Levelling [from Dunstable] to Dunstable Trigonometrical Station, &c.,) (1GL) Birmingham to London (Branch Line from Dunchurch to Rugby) (1GL) Bishopston to Carmarthen (3GL) Boscastle to Grampound (2GL) Boscastle to Liskeard (3GL) Boscastle to Torrington (3GL) Boston to Immingham (3GL) Bowling to Arrochar (3GL) Bowling to Gourock (3GL) Braemar to Banchory (2GL) Braemar to Rhynie (3GL) Brampton Abbotts to Abergavenny (2GL) Brampton Abbotts to Abergavenny (3GL) Brampton Abbotts to Penhow (3GL) Brampton Abbotts to Suckley (2GL) Brecknock to Cardigan (1GL) Brecknock to Cardigan (Branch Levelling [from Crug-y-Biswal] to Trigonometrical Stations) (1GL) Brecon to Llandovery (2GL) Brecon to Llandovery (3GL) Brentford to Harrow-on-the-Hill Bridford to Beer (2GL) Bridford to Dulverton (3GL) Bridford to Yelverton (2GL) Bridge of Orchy to Arrochar (2GL) Bridge of Orchy to Crianlarich (3GL) Bridge of Orchy to Loch Leven (3GL) Bridgewater to Plymouth (1GL) Bridgewater to Plymouth (Branch Line from Instow Quay to Bideford, through Appledore and Northam) (1GL) Bridgewater to Plymouth (Levelling to High Wilhays Trignometrical Station) (1GL) Bristol to Plymouth (1GL) Bristol to Plymouth (Branch Levelling from Bristol to Portishead) (1GL) Bristol to Plymouth (Branch Line from East Brent to Weston-super-mare) (1GL) Bristol to Plymouth (Levelling from Buckfastleigh to Ryder's Hill Trigonometrical Station) (1GL) Bristol to Plymouth (Levelling from Chudleigh to Torquay) (1GL) Bristol to Plymouth (Levelling from Ivy Bridge to Butterton New Trigonometrical Station) (1GL) Bristol to Plymouth (Levelling from Wrangerton to Ugborough Trigonometrical Station) (1GL) Bristol to Plymouth (Levelling to public buildings, &c. in Exeter and its vicinity) (1GL) British Museum to Tilbury British Museum to Ware Broadford to Sligachan (3GL) Brockenhurst to Freshwater (IOW) (3GL) Bromsgrove to Suckley (2GL) Bromsgrove to Warwick (2GL) Bromsgrove to Warwick (3GL) Broomhead Moor to Matlock (3GL) Buchan Ness to Aberdeen (2GL) Buchan Ness to Aberdeen north (3GL) Buckland to Sapperton (2GL) Buckland to Sapperton (3GL) Buittle to Creetown (2GL) Buittle to Dalry (2GL) Buittle to Ecclefechan (3GL) Bulmer to Flamborough (3GL) Bulmer to Northallerton (2GL) Bulmer to South Cave (3GL) Buntingford to Clare (2GL) Buntingford to Great Linford (3GL) Caddonfoot to Hawick (2GL) Caernarvon to Conwy (3GL) Caernarvon to Holyhead (3GL) Campden to Warwick (3GL) Cardiff to Tenbury (1GL) Cardigan to Aberystwyth (3GL) Carlisle to North Shields (1GL) Carlisle to Sark Bridge (1GL) Carmarthen to Haverfordwest (3GL) Carmarthen to Llandovery (2GL) Carronbridge to New Cumnock (2GL) Castor to Cranford (3GL) Castor to North Pickenham (3GL) Castor to Waltham on the Wolds (3GL) Castor to Waltham-on-the-Wolds (2GL) Castor to Wicken (2GL) Chelmsford to British Museum Church Stretton to Brecon (2GL) Church Stretton to Bromsgrove (3GL) Church Stretton to Oswestry (3GL) Clare to Ipswich (2GL) Clare to Wicken (3GL) Cockermouth to Wetheral (3GL) Connel to Loch Leven (3GL) Contin to Achnasheen (2GL) Contin to Inverness (2GL) Contin to Scourgie (3GL) Conwy to Dyserth (3GL) Corwar to Ayr (2GL) Countisbury to North Petherton (3GL) Coventry to Lincoln (1GL) Coventry to Lincoln (Branch Line [from Stretton Toll House] to Rugby) (1GL) Cowbridge to Bishopston (3GL) Crailing to Longtown (1GL) Cranford to Castor (2GL) Cranford to Great Linford (3GL) Creetown to Buittle (3GL) Creetown to Corwar (2GL) Crianlarich to Arrochar (3GL) Crieff to Stirling (1GL) Croydon (East) to British Museum Croydon to Alfriston (3GL) Croydon to British Museum Croydon to Buntingford (3GL) Croydon to Snodland (2GL) Croydon to Windsor Castle (2GL) Dagenham to Plumstead Dalry to Ayr (3GL) Dalry to Buittle (3GL) Dalry to Thankerton (2GL) Dalwhinnie to Daviot (3GL) Dalwhinnie to Tummel Bridge (2GL) Daresbury to Liverpool (3GL) Daresbury to Wrexham (2GL) Darlington to Scarborough (1GL) Darlington to Scarborough (Branch Levelling [from Acklam] to Middlesborough) (1GL) Daventry to Great Linford (2GL) Daventry to Warwick (3GL) Daviot to Elgin (3GL) Daviot to Newtonmore (2GL) Daviot to Spean Bridge (2GL) Daviot to Tain (3GL) Dorchester to Beer (2GL) Dorchester to Beer (3GL) Dorchester to Thornford (3GL) Dornie to Achnasheen (2GL) Dornie to Achnasheen (3GL) Dornie to Glen Cluanie (3GL) Dulverton to Bridford (2GL) Dulverton to North Petherton (3GL) Dulverton to Torrington (2GL) Dunbar Circuit (2GL) Dunbar Circuit (3GL) Dunbar Circuit (3GL) Dunbar East to Mordington (3GL) Dunbar West to Dunbar East (2GL) Dunbar West to Dunbar Tidal Observatory (2GL) Duncansby Head to Lybster (2GL) Duncansby Head to Lybster (3GL) Dunlop to Milngavie (2GL) Dunlop to Thankerton (2GL) Duns Common to Kelso (3GL) Durness to Bettyhill (3GL) Durness to Tongue (2GL) Dyserth to Wrexham (3GL) East Harling to North Pickenham (3GL) East Harling to Whitton Green South (2GL) East India Dock to Greenwich Ecclefechan to Buittle (2GL) Ecclefechan to Wetheral (3GL) Edinburgh to Aberdeen (1GL) Edinburgh to Innerleithen (2GL) Edinburgh to Linlithgow (2GL) Edinburgh to Linlithgow (3GL) Edinburgh to Mauchline (1GL) Edinburgh to Whittingehame (3GL) Elgin to Daviot (2GL) Elgin to Portsoy (3GL) Elvanfoot to Moffat (2GL) Elvanfoot to Moffat (3GL) Elvanfoot to New Cumnock (3GL) Enfield to Ilford Exeter to Southampton (1GL) Exeter to Southampton (Branch Levelling from Bridport Market House to Bridport Harbour) (1GL) Exeter to Southampton (Branch Levelling [from Winterbourne Abbas] to Hardy Monument on Black Down) (1GL) Exeter to Southampton (Branch Line from Dorchester to Weymouth) (1GL) Exeter to Southampton (Branch Line from Wareham to Swanage) (1GL) Fareham to Arundel (2GL) Fareham to Southampton (2GL) Fareham to Southampton (3GL) Fareham to Winchester (2GL) Fareham to Winchester (3GL) Felixstowe Circuit (2GL) Felixstowe to Ipswich (3GL) Flamborough to Mickleby (3GL) Flax Bourton to Sharpness (2GL) Flax Bourton to Sharpness (3GL) Flax Bourton to Upton Lovell (3GL) Fochabers to Bridge of Don (Branch Line from Inveraven to Aviemore Inn) (1GL) Forcett to Northallerton (3GL) Forcett to Wolsingham (2GL) Freshwater (IOW) to Calbourne (IOW) (3GL) Garve Inn to Altannakealgach Inn (1GL) Gibraltar Gimingham to Whitton Green South (2GL) Gimmingham to Whitton Green North (3GL) Glasgow to Edinburgh (1GL) Glasgow to Inverness (1GL) Glen Almond to Auchterarder (2GL) Glen Cluanie to Dornie (2GL) Glen Cluanie to Glen Moriston (3GL) Glen Moriston to Loch Tarff (3GL) Glen Moriston to Scourguie (3GL) Glenluce to Halfway House (1GL) Glenshee to Braemar (2GL) Glenshee to Braemar (3GL) Glenshee to Laurencekirk (2GL) Glenshee to Laurencekirk (3GL) Gloucester to London (1GL) Gloucester to London (Branch Line from Lorridge to Purton Passage, &c.) (1GL) Gloucester to London (Branch Line from Ridgway to Aust Pier) (1GL) Gloucester to London (Branch Line to Newnham Passage, &c.) (1GL) Gloucester to West Angle Bay (1GL) Gourock to High Boydston (3GL) Grampound to Liskeard (2GL) Grampound to Liskeard (3GL) Grampound to Troon (2GL) Great Bedwyn to Wallingford (3GL) Great Linford to Cranford (2GL) Great Linford to Daventry (3GL) Great Linford to Hemel Hempstead (2GL) Great Linford to Hemel Hempstead (3GL) Great Linford to Wallingford (2GL) Great Yarmouth to King's Lynn (1GL) Greenwich to Snodland Greetland to Broomhead Moor (2GL) Greetland to Broomhead Moor (3GL) Greetland to Skipton (2GL) Guestling to Alfriston (2GL) Guestling to Alfriston (3GL) Gurnard (IOW) to Freshwater (IOW) (3GL) Haddington to East Linton (1GL) Hatfield Peverel to Buntingford (3GL) Hatfield Peverel to Croydon (2GL) Hatfield Peverel to Snodland (3GL) Hatfield to British Museum Haverfordwest to Cardigan (3GL) Haverfordwest to Carmarthen (3GL) Hawick to Kelso (2GL) Hawick to Moffat (2GL) Hawick to Newcastleton (3GL) Helmsdale to Bonar Bridge (2GL) Helmsdale to Tain (3GL) Hemel Hempstead to Buntingford (2GL) Hemel Hempstead to Wallingford (3GL) Hemel Hempstead to Windsor Castle (2GL) Hendon to Enfield Hexham to Hawick (3GL) Hexham to Longhorsley (2GL) Hexham to Wolsingham (3GL) Hibaldstow to Matlock (2GL) Hibaldstow to Navenby (3GL) Hibaldstow to South Cave (2GL) High Boydston to Ayr (3GL) High Boydston to Dunlop (3GL) Hoghton to Lancaster (3GL) Holyhead to Conwy (3GL) Hounslow to Hampton Huddersfield to Selby (1GL) Hull to Scarborough (1GL) Hull to Scarborough (Branch Levelling from Bridlington to Flamborough Head) (1GL) Hull to Scarborough (Branch Levelling to Filey Church, &c.) (1GL) Hull to Scarborough (Branch Levelling to Sutton Church) (1GL) Hull to Scarborough (Branch Levelling to Swine, Ellerby, Marton, Burton Constable and Sproatley) (1GL) Ilford to Barking Immingham to Hibaldstow (3GL) Immingham to Patrington (3GL) Innerleithen to Duns Common (2GL) Innerleithen to Hawick (3GL) Invergarry to Glen Cluanie (2GL) Inverkeithing to Forrest's Inn (1GL) Inverness to Aberdeen (1GL) Inverness to Thurso (1GL) Ipswich to Clare (3GL) Ipswich to East Harling (3GL) Ipswich to Felixstowe (Observatory Bench Mark) (2GL) Ipswich to Hatfield Peverel (2GL) Ipswich to Hatfield Peverel (3GL) Isle of Thanet to Guestling (3GL) Kelso to Duns Common (2GL) Kelso to Hawick (3GL) Keswick to Ambleside (1GL) Kilmarnock to Dumfries (1GL) Kilmarnock to Glasgow (1GL) Kinghorn to Rosyth (2GL) Kinghorn to Rosyth (3GL) Kings Lynn to North Pickenham (2GL) Kirkby Kendal to Broughton (1GL) Kirkby Kendal to Carlisle (1GL) Kirkby Kendal to Carlisle (Branch Levelling [from Lickwhit Inn] to Silloth Dock) (1GL) Kirkby Kendal to Carlisle (Branch Levelling [from Wigton] to Forest Hall Trignometrical Station, &c.) (1GL) Kirkby Kendal to Thirsk (1GL) Kirkby Stephen to Penrith (2GL) Kirkby Stephen to Ribblesdale (3GL) Lairg to Loch Naver (2GL) Lairg to Loch Naver (3GL) Lairg to Tain (2GL) Lairg to Tain (3GL) Lampeter to Llandovery (3GL) Lancaster to Ulverston (3GL) Laurencekirk to Aberdeen (2GL) Laurencekirk to Arbirlot (2GL) Laurencekirk to Arbirlot (3GL) Laxford Bridge to Durness (2GL) Laxford Bridge to Durness (3GL) Ledmore to Lairg (3GL) Ledmore to Laxford Bridge (2GL) Ledmore to Laxford Bridge (3GL) Leeks to Logierait (1GL) Leicester to Burton-upon-Trent (1GL) Linlithgow to Kincardine (2GL) Linlithgow to Milngavie (2GL) Linlithgow to Milngavie (3GL) Linlithgow to Stirling (3GL) Liskeard to Kingsbridge (3GL) Liskeard to Yelverton (3GL) Liverpool F.B.M. to Liverpool Tide Gauge (2GL) Liverpool to Daresbury (2GL) Liverpool to Dyserth (3GL) Liverpool to Hoghton (3GL) Liverpool to Port Carlisle (1GL) Liverpool to Spurn Head (1GL) Liverpool to Spurn Head (Branch Levelling [from Marsden to Standege Tunnel] along Huddersfield Canal) (1GL) Liverpool to Spurn Head (Levelling along the Leeds and Hull Railway) (1GL) Llandovery to Carmarthen (3GL) Llandysilio to Stafford (1GL) Llanstephan to Dolfar Toll House (1GL) Llanstephan to Dolfor Toll-House (Branch Line from Builth to Glasbury) (1GL) Loch Leven to Bridge of Orchy (2GL) Loch Leven to Spean Bridge (3GL) Loch Leven to Tobermory (3GL) Loch Naver to Bettyhill (3GL) Loch Naver to Leckfurin (2GL) Loch Tarff to Daviot (3GL) Lochgilphead to Connel (3GL) London to Brighton (1GL) London to Brighton (Branch Levelling from Lewes to Kingstone Church, &c.) (1GL) London to Brighton (Branch Levelling to Bidborough Church, &c.) (1GL) London to Brighton (Branch Levelling to Great Under River and Shipborne Churches, &c.) (1GL) London to Brighton (Branch Levelling to Isfield Church, &c.) (1GL) London to Brighton (Branch Levelling to Leigh Church, &c.) (1GL) London to Brighton (Branch Levelling to Ringmer Church, &c.) (1GL) London to Brighton (Branch Levelling to Seven Oaks Weald Church, &c.) (1GL) London to Brighton (Branch Levelling to Speldhurst Church, &c.) (1GL) London to Doncaster (1GL) London to Doncaster (Branch Levelling [from Hatfield Peverel] to Danbury Church, &c.) (1GL) London to Doncaster (Branch Levelling [from Stracey Arms] to Halvergate Church) (1GL) London to Doncaster (Branch Levelling [from Witham] to Wickham Bishop New Church) (1GL) London to Doncaster (Branch Levelling [from Wrentham] to Covehithe Church) (1GL) London to Doncaster (Branch Levelling [from Wrentham] to South Cove Church) (1GL) London to Doncaster (Branch Line from Colchester to Harwich) (1GL) London to Doncaster (Branch Line from Stratford St. Mary to Stoke) (1GL) London to Doncaster (Branch Line from Wangford to Southwold and Walberswick) (1GL) London to Dover (1GL) London to Dover (Branch Line from Key-street to Sheerness) (1GL) London to Dunstable (1GL) London to Dunstable (Branch Levelling to Hitchin Church, &c.) (1GL) London to Dunstable (Branch Levelling [within Ware] to Ware Church &c.) (1GL) Longhorsley to Belford (2GL) Longhorsley to Hexham (3GL) Longtown to Edinburgh (1GL) Longtown to Port Patrick (1GL) Lostwithiel to Padstow (1GL) Lostwithiel to Padstow (Levelling to Trevose Head) (1GL) Lybster to Helmsdale (2GL) Lybster to Helmsdale (3GL) Macclesfield to Daresbury (2GL) Macclesfield to Daresbury (3GL) Machynlleth to Newtown (3GL) Machynlleth to Trawsfynydd (3GL) Madron to Troon (3GL) Manchester to Gloucester (1GL) Manchester to Gloucester (Branch Levelling to Great Malvern Trigonometrical Station) (1GL) Manchester to Gloucester (Branch Levelling to Public Buildings, &c. in Birmingham) (1GL) Manchester to Gloucester (Branch Levelling to Public Buildings, &c. in the City of Worcester and its environs) (1GL) Manchester to Gloucester (Branch Levelling [from Powick] to Great Malvern) (1GL) Manchester to Gloucester (Branch Levelling [from Stanbrook] to Kempsey Church) (1GL) Manchester to Gloucester (Branch Line from Newcastle-under-Lyme to Hanford) (1GL) Manchester to Halifax (1GL) Matlock to Broomhead Moor (2GL) Matlock to Macclesfield (2GL) Matlock to Macclesfield (3GL) Matlock to Melbourne (2GL) Matlock to Melbourne (3GL) Maybole to Newton Stewart (1GL) Maybush Circuit (3GL) Maybush to Winchester (3GL) Melbourne to Nuneaton (2GL) Melbourne to Nuneaton (3GL) Melbourne to Stafford (2GL) Melbourne to Stafford (3GL) Melbourne to Waltham-on-the-Wolds (2GL) Melvich to Helmsdale (1GL) Mickleby to Longhorsley (3GL) Milner's Bridge to Bradford (1GL) Milngavie to Bowling (3GL) Milngavie to Bowling (via Govan) (3GL) Milngavie to Necropolis (2GL) Milngavie to Stirling (2GL) Moffat to Ecclefechan (2GL) Moffat to Ecclefechan (3GL) Montrose to Kincardine O'Neil (1GL) Mordington to Belford (2GL) Mordington to Belford (3GL) Mordington to Duns Common (2GL) Mordington to Duns Common (3GL) Navenby to Castor (3GL) Navenby to Hibaldstow (2GL) Navenby to Thornham (2GL) Necropolis to Dunlop (2GL) Necropolis to Dunlop (3GL) New Cumnock to Ayr (2GL) New Cumnock to Ayr (3GL) New Cumnock to Dalry (2GL) Newark-upon-Trent to Elton (1GL) Newark-upon-Trent to Elton (Branch Levelling from Allington Toll-house to Grantham) (1GL) Newbridge to Rosyth (2GL) Newcastle-under-Lyme to Chester (1GL) Newcastle-upon-Tyne to Berwick-upon-Tweed (1GL) Newcastle-upon-Tyne to Crailing (1GL) Newcastleton to Ecclefechan (2GL) Newcastleton to Hawick (2GL) Newcastleton to Wetheral (3GL) Newlyn (Tolcarne) to Observatory (2GL) Newlyn Circuit (2GL) Newlyn Circuit (3GL) Newtown to Chester (1GL) Newtown to Church Stretton (3GL) North Petherton to Dulverton (2GL) North Petherton to Flax Bourton (2GL) North Petherton to Flax Bourton (3GL) North Petherton to Flax Bourton (Axmouth to Perry Farm Branch) (2GL) North Petherton to Flax Bourton (Stolford Branch) (2GL) North Pickenham to East Harling (2GL) North Pickenham to Thornham (3GL) North Shields to Stockton-upon-Tees (1GL) North Shields to Stockton-upon-Tees (Branch Levelling through Hartlepool to Wolviston) (1GL) Northallerton to Bulmer (3GL) Northallerton to Forcett (2GL) Northallerton to Mickleby (3GL) Nuneaton to Warwick (3GL) Oswestry to Church Stretton (2GL) Oswestry to Daresbury (3GL) Oxford to Bath (1GL) Patrington to Flamborough (3GL) Penhow to Cowbridge (3GL) Penrith to Darlington (1GL) Penrith to Kirkby Stephen (3GL) Penrith to Wetheral (2GL) Penrith to Workington (1GL) Penrith to Workington (Branch Line from Cockermouth to Maryport) (1GL) Perth to Crianlarich Inn (1GL) Perth to Glenshee (2GL) Perth to Glenshee (3GL) Perth to St Andrews (2GL) Pitlochry to Glen Almond (2GL) Plymouth to St. Ives (1GL) Plymouth to St. Ives (Branch Levelling from Marazion to Penzance) (1GL) Plymouth to St. Ives (Levelling [from Penzance] to Pertinney Trigonometrical Station) (1GL) Port Patrick to Stranraer, through Ardwell and Sandhead (1GL) Port Patrick to Stranraer, through Kirkcolm (1GL) Portsoy to Elgin (2GL) Portsoy to Rosehearty (2GL) Portsoy to Rosehearty (3GL) Preston to Halifax (1GL) Preston to Lancaster (1GL) Preston to Lancaster (Branch Line from Lancaster to Poulton by the Sands) (1GL) Preston to Lancaster (Branch Line from Thurnham Bridge to Galgate) (1GL) Preston to Lancaster (Branch Line from Thurnham Bridge to Glasson Docks) (1GL) Preston to Manchester (1GL) Reay to Duncansby Head (2GL) Reay to Duncansby Head (3GL) Rhynie to Portsoy (2GL) Rhynie to Portsoy (3GL) Ribblesdale to Kirkby Stephen (2GL) Ribblesdale to Skipton (3GL) Rickmansworth to British Museum Rosehearty to Buchan Ness (2GL) Rosehearty to Buchan Ness (3GL) Rosyth to Edinburgh (3GL) Rosyth to Stirling (2GL) Sapperton to Campden (2GL) Sapperton to Campden (3GL) Sapperton to Sharpness (2GL) Scourguie to Daviot (3GL) Selby to Newcastle-upon-Tyne (1GL) Selby to Newcastle-upon-Tyne (Branch Levelling from Riccall to Escrick, through Stillingfleet) (1GL) Selby to Newcastle-upon-Tyne (Branch Levelling [from Thirsk] to South Kilvington Church) (1GL) Selby to Newcastle-upon-Tyne (Branch Line from Overton to Tollerton) (1GL) Selby to Newcastle-upon-Tyne (Branch Line from Tollerton To Easingwold) (1GL) Sharpness to Brampton Abbots (2GL) Sharpness to Brampton Abbots (3GL) Sharpness to Penhow (3GL) Sharpness to Sapperton (3GL) Sheffield to Birmingham (1GL) Sheffield to Birmingham (Branch Levelling to Darley Church) (1GL) Sheffield to Birmingham (Branch Levelling to St. Mary's College, near Erdington) (1GL) Sheffield to Birmingham (Branch Levelling [from Burton-upon-Trent] to Stapenhill Church) (1GL) Sheffield to Birmingham (Branch Levelling [from Clay Cross] to North Wingfield Church) (1GL) Sheffield to Birmingham (Branch Levelling [from Swanwick] to Pentrich Church) (1GL) Skipton to Greetland (3GL) Skipton to Hoghton (3GL) Skipton to Ribblesdale (2GL) Skipton to Wetherby (2GL) Skipton to Wetherby (3GL) Snodland to Croydon (3GL) Snodland to Godstone Snodland to Isle of Thanet (3GL) Snodland to Wye (2GL) Snodland to Wye (3GL) South Cave to Bulmer (2GL) South Cave to Hibaldstow (3GL) Southampton to Dover (1GL) Southampton to Dover (Branch Levelling from Brighton to Ditchling Trigonometrical Station, &c.) (1GL) Southampton to Tide Gauge, Empress Dock, Southampton (2GL) Southampton to Tide Gauge, Town Quay, Southampton (2GL) Southampton to Wimborne (2GL) Southampton to Wimborne (3GL) Southampton to Wimborne - Branch Line [Wimborne to Broadstone] (2GL) Southampton to Winchester (2GL) Southampton to Winchester - Eastleigh to Winchester Branch (2GL) Southampton to Winchester - Romsey Circuit Branch (2GL) Spean Bridge to Dalwhinnie (2GL) Spean Bridge to Dornie (3GL) Spean Bridge to Loch Leven (2GL) Spean Bridge to Loch Tarff (3GL) St Andrews to Kinghorn (3GL) St. Andrews to Kinghorn (2GL) Stafford to Church Stretton (2GL) Stafford to Church Stretton (3GL) Staines to British Museum Stepney to Deptford Stirling to Perth (2GL) Stirling to Perth (3GL) Stranraer to Creetown (3GL) Stranraer to Glasgow (1GL) Stranraer to Glasgow (Branch Levelling [from Westfield] to Pollockshaws) (1GL) Stranraer to Portpatrick (3GL) Suckley to Church Stretton (2GL) Suckley to Church Stretton (3GL) Surbiton to British Museum Swineshead to Rawcliffe (1GL) Swineshead to Rawcliffe (Branch Levelling [from Killingholme] to Killingholme Light-houses) (1GL) Tain to Contin (2GL) Tain to Contin (3GL) Tarbet to the Mull of Cantyre (1GL) Tarf Bridge to Ayr (1GL) Taunton to Lyme Regis (1GL) Taunton to Lyme Regis (Branch Levelling from Catherine Wheel Inn to Ilton Church) (1GL) Taunton to Lyme Regis (Branch Levelling from Horton to Broadway Church, &c.) (1GL) Taunton to Lyme Regis (Branch Levelling from Horton to Donyatt Church, &c.) (1GL) Taunton to Lyme Regis (Branch Levelling to Chardstock Church, &c.) (1GL) Taunton to Lyme Regis (Branch Levelling to Cricket Malherbe and Knoll St. Giles's Churches, &c.) (1GL) Taunton to Lyme Regis (Branch Levelling to Westhatch Church) (1GL) Tavistock to Liskeard (1GL) Thankerton to Dunlop (3GL) Thankerton to Elvanfoot (3GL) Thankerton to Innerleithen (2GL) Thankerton to Innerleithen (3GL) Thankerton to Linlithgow (2GL) Thankerton to Linlithgow (3GL) Thirsk to Scarborough (1GL) Thorne to Staleybridge (1GL) Thornford to Dorchester (2GL) Thornford to North Petherton (2GL) Thornham to Gimingham (2GL) Thornham to Gimmingham (3GL) Thornham to Navenby (3GL) Thrapstone to Chelmsford (1GL) Thrapstone to Chelmsford (Branch Levelling in the City of Cambridge) (1GL) Thrapstone to Chelmsford (Branch Line from Braintree to Marks Tey) (1GL) Thurso to Bonar Bridge (1GL) Thurso to Bonar Bridge (Branch Levelling from Tongue to Erriboll) (1GL) Tilbury to Gravesend Tobermory to Connel (3GL) Tongue to Reay (2GL) Torrington to Boscastle (2GL) Torrington to Countisbury (3GL) Torrington to Dulverton (3GL) Totton to Calbourne (IOW) (3GL) Towcester to King's Lynn (1GL) Towcester to King's Lynn (Branch Levelling [from Northampton] to Hardingstone Church) (1GL) Trawsfynydd to Caernarvon (3GL) Troon to Boscastle (3GL) Troon to Grampound (3GL) Troon to Newlyn (Tolcarne) (2GL) Tummel Bridge to Bridge of Cally (2GL) Tummel Bridge to Crianlarich (2GL) Tummel Bridge to Crianlarich (3GL) Tummel Bridge to Dalwhinnie (3GL) Tummel Bridge to Glenshee (3GL) Tyndrum to Lochgilphead (1GL) Tynemouth Loop (3GL) Ullapool to Lairg (2GL) Ullapool to Ledmore (3GL) Ulverston to Wasdale (3GL) Upton Lovell to Flax Bourton (2GL) Upton Lovell to Great Bedwyn (3GL) Upton Lovell to Thornford (3GL) Wallingford to Buckland (2GL) Wallingford to Buckland (3GL) Wallingford to Windsor Castle (3GL) Waltham on the Wolds to Melbourne (3GL) Waltham-on-the-Wolds to Navenby (2GL) Warrington to Adlington (1GL) Warrington to Pembroke Docks (1GL) Warrington to Pembroke Docks (Branch Levelling from St. Asaph to Rhyddlan) (1GL) Warrington to Pembroke Docks (Branch Levelling in Birkenhead and its environs) (1GL) Warrington to Pembroke Docks (Branch Levelling [from Cardigan Bridge] to Cardigan Tide-gauge, &c.) (1GL) Warrington to Pembroke Docks (Branch Line from Bangor to Holyhead) (1GL) Warrington to Pembroke Docks (Branch Line from Chester to Birkenhead) (1GL) Warrington to Pembroke Docks (Levelling [from Eglwys-wrw] to Precelly Trignometrical Station, &c.) (1GL) Warrington to Pembroke Docks (Levelling [from Frodsham] to Delamere Trigonometrical Station, &c.) (1GL) Warrington to Pembroke Docks (Levelling [from Holyhead] to Holyhead Trigonometrical Station, &c.) (1GL) Warrington to Pembroke Docks (Levelling [from Llanfairfechan] to Penmaen-mawr Trignometrical Station, &c.) (1GL) Warwick to Campden (2GL) Warwick to Daventry (2GL) Warwick to Nuneaton (2GL) Wasdale to Cockermouth (3GL) Wester Broomhouse to Duns Common (2GL) Wester Broomhouse to Whittinghame (2GL) Wetheral to Hexham (3GL) Wetheral to Newcastleton (2GL) Wetheral to Penrith (3GL) Wetherby to Bulmer (2GL) Wetherby to Bulmer (3GL) Weymouth Loop (3GL) Whitehurst Gate Toll House to Dolgelly (1GL) Whittingehame to Edinburgh (2GL) Whittingehame to Wester Broomhouse (3GL) Whitton Green North to Ipswich (3GL) Whitton Green South to Ipswich (2GL) Wick to Thurso (1GL) Wicken to Castor (3GL) Wicken to Clare (2GL) Widmerpool to Derby (1GL) Willesden to Hendon Wimborne to Dorchester (2GL) Wimborne to Dorchester (3GL) Winchester to Basingstoke (2GL) Winchester to Basingstoke (3GL) Winchester to Upton Lovell (2GL) Winchester to Upton Lovell (Mottisfont to Romsey Branch) (2GL) Windsor Castle to Croydon (3GL) Windsor Castle to Wallingford (2GL) Wolsingham to Forcett (3GL) Wolsingham to Hexham (2GL) Wolsingham to Kirkby Stephen (2GL) Worcester to Aberystwyth (1GL) Worcester to Aberystwyth (Branch Levelling from Stourport to Kidderminster) (1GL) Wrexham to Oswestry (2GL) Wrexham to Oswestry (3GL) Wye to Guestling (2GL) Wye to Guestling (3GL) Yelverton to Bridford (3GL) Yelverton to Liskeard (2GL) York to Bridlington (1GL)