Schedule Prohibition on dredgingI1 England and Wales In the Schedule a group of two letters and five or six figures identifying or associated with any point represents the map co-ordinates of that point estimated to the nearest ten metres on the grid of the national reference system used by the Ordnance Survey on its maps and plans. Annotations Commencement I1 Sch. in force at 1.3.2010, see art. 1(2) ← Signature Schedule Note →