Ordnance Survey 1:25,000: Provisional; First Series; Second Series and Pathfinder maps.
Ordnance Survey One Inch: Seventh Series; New Popular; Fifth; Popular; Third; Revised New Series and Old Series.
Other Ordnance Survey : Quarter Inch; Half Inch; Special Editions; Illustrated Covers; Historical; Geological; Town Plans and Large Scale Sheet Maps of London.
Non-OS post-1900: e.g. Bacon; Bartholomew; Cruchley; Cycling Maps; Road Maps
Early Folded Maps: e.g. Cary; Langley; Mogg; Bowles; Rocque; Sayer; Faden; Bowen; Kitchin; Smith and similar.