Collections of plans, maps and atlases are available at family, house and social history societies, city archives, county record offices, and public and university libraries. The most important and significant collections of maps for England can be found at the British Library, the Bodleian Library at Oxford and The National Archives. The National Library of Scotland has the largest collection of maps in Scotland (and one of the largest in the world), including many covering the rest of the UK and an extensive digital collection. Similarly, the National Library of Wales has a collection of more than one million sheets of maps and thousands of atlases.
British Library at St. Pancras
96 Euston Road
London NW1 2DB
https://www.bl.uk/
Bodleian Library
Broad Street
Oxford OX1 3BG
https://www.bodleian.ox.ac.uk/
The National Archives
Ruskin Avenue
Kew
Richmond
Surrey TW9 4DU
https://www.nationalarchives.gov.uk
The National Library of Scotland
Map Collections
Causewayside Building
33 Salisbury Place
Edinburgh EH9 1SL
https://www.nls.uk/collections/maps
The National Library of Wales
Aberystwyth
Ceredigion SY23 3BU
https://www.library.wales/discover-learn/digital-exhibitions/maps