Within the BGS website is a map tool that enables you to display the locations and reference numbers of all boreholes the BGS hold logs for. It includes enormous numbers of construction industry shallow boreholes, most of which do not penetrate below rockhead. The numbers of boreholes that do penetrate solid measures to a considerable depth is very considerable and certainly far greater than appear of BGS 1:10,560 maps and in 1":1mile / 1:50,000 sheet memoirs.