[we need a 10 metre core sample from the middle of Broomhill street; see what's in there!][/QUOTE]
British Geological Survey web site has a number of boreholes. One behind Broomhill St. from 1974 shows:
0 - 2m Made ground, coal dust, sand and gravel and bricks.
2 - 4m Loose coarse brown sand and fine coarse gravel.
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