Deep Bench Mark: Barbican B   

Ove Arup BH4 - below manhole cover, W side of Whitecross Street [3GL]; DEEP BM BARBICAN SITE B S SIDE CROMWELL TWR.

Location
Grid reference: TQ 3242 8187.
Landranger 176: West London, Rickmansworth & Staines.
Landranger 177: East London, Billericay & Gravesend.
Waypoint: DP0003.

Neighbouring Flush Brackets

S7174	Newgate Street, General Post Office 682.50m to the southwest.
S0541	St Paul's Cathedral 801.31m to the southwest.
S7175	Shoreditch, Town Hall 1.19km to the northeast.
S0834	Aldgate, St. Botolph's Church 1.35km to the southeast.
L4	London, Trinity Square 1.53km to the southeast.

The nearest fundamental bench mark is Croydon, 21.25km to the south.

Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Croydon to Buntingford levelling line. The surveyor's description was Deep Bench Mark Ove Arup BH4 - below manhole cover, W side of Whitecross Street.