Geological Survey of Great Britain (England and Wales) Great Britain. Ordnance Survey. Sheet 331 solid with drift. North Decimal Degree 50.8167. South Decimal Degree 50.6500. East Decimal Degree -0.8667. West Decimal Degree -1.2667. Relief shown by contour interval and spot heights.Transverse Mercator projection. National grid system. "Original Geological Survey on the one-inch scale by H. W. Bristow, F.R.S. Published on Sheets 9,10, 11, Old Series, 1856-1864. Resurveyed on the six-inch scale by C. Reid (Tertiary) & A. Strahan M.A. (Cretaceous). Published with Drift, June 1893. Reprinted 1954 with new Horizontal and Vertical sections by G. Bisson.".