The Ordnance Survey list has just 1 Benchmark in grid SE1847, which is a normal Cut Mark
1 – CUT MARK – GTP 11.6M N FENCE JUNC N SIDE RD
MISSING
The Cut mark is on a gatepost 11.6mtrs north of the fence on the North side of the road
The field the gateway was in has no public access so I couldn’t do a close search, which doesn’t make much difference to my declaration that the mark is missing as 11.6mtrs would put the mark on the southern gatepost – which is itself missing