B.M. on Old Railway Bridge, near Heathfield

Reference: The NGR and details for this item were kindly supplied by Sheron Vowden, as were the photographs to identify this benchmark which is cut into the railway bridge on the road between Heathfield and Little Bovey. Yet again nothing is shown on the OS Maps that I have access to, but it does appear more modern so may well feature on a 1949-1969 map.