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Latitude: 51.1492 / 51°8'57"N
Longitude: -1.6426 / 1°38'33"W
OS Eastings: 425094.055035
OS Northings: 138939.672734
OS Grid: SU250389
Mapcode National: GBR 61S.ZFJ
Mapcode Global: VHC32.GCZW
Entry Name: Flint mines, linear boundary and two bowl barrows at Martin's Clump, Porton Down
Scheduled Date: 8 January 1971
Last Amended: 9 February 2001
Source: Historic England
Source ID: 1017168
English Heritage Legacy ID: 26787
County: Hampshire
Civil Parish: Over Wallop
Traditional County: Hampshire
Lieutenancy Area (Ceremonial County): Hampshire
Church of England Parish: Over Wallop St Peter
Church of England Diocese: Winchester