Ordnance Survey, 1:25,000 maps of Great Britain - 1945-1971

Detail of 1:25,000 map of Berwick-upon-Tweed

The 1:25,000 'Provisional edition' or 'First Series', was Ordnance Survey's first civilian map series at this medium scale, the forerunner of the modern Explorer and Outdoor Leisure maps. By 1956 it covered 80% of Great Britain, everywhere apart from the Scottish Highlands and Islands. The series is useful for showing rural and urban areas in much greater detail than the standard one-inch to the mile (1:63,360) maps.

Further information on this group of maps.