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Flush Bracket 56: Alderbury Junction Signal Box 
Flush Bracket on S.W. face of signal box, Alderbury Junction [2GL]; signal box, S side of railway, W angle.
Location
Grid reference: SU 1950 2727.
Landranger 184: Salisbury & The Plain, Amesbury.
Structure: Railway building.
Waypoint: FB56.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Maybush,
22.80km to the southeast.
Second Geodetic Levelling, England & Wales (1912-21)
This flush bracket was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 221.8980 feet [67.6345 metres] above mean sea level (Newlyn datum). It was included on the Winchester to Upton Lovell levelling line. The surveyor's description was Flush Bracket on S.W. face of signal box, Alderbury Junction.
Location
Grid reference: SU 1950 2727.
Landranger 184: Salisbury & The Plain, Amesbury.
Structure: Railway building.
Waypoint: FB56.
Neighbouring Flush Brackets
| 57 | Alderbury Common 666.03m to the northwest. |
| 58 | The Slip 1.63km to the northwest. |
| 55 | East Grimstead, Railway Bridge 3.00km to the east. |
| S9943 | Nunton, Lower Farm 3.71km to the west. |
| 54 | Dean Road Railway Bridge 3.90km to the east. |
Second Geodetic Levelling, England & Wales (1912-21)
This flush bracket was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 221.8980 feet [67.6345 metres] above mean sea level (Newlyn datum). It was included on the Winchester to Upton Lovell levelling line. The surveyor's description was Flush Bracket on S.W. face of signal box, Alderbury Junction.
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