Bickerton Pill Box (Hepple) - Source of Reference
The information on this website is based on a range of published and unpublished works. Below is a list of the source of information used in writing this record.
1) Fortress Study Group - North East, 1987. Coquet Stop Line, Northumberland. Unpublished (no 17)
1a) Northumbrian District of Northern Command files (Northumberland Records Office, W0199/1512)
2) First Amendment of the 12th list of Buildings of Special Architectural or Historic Interest, District of Alnwick (Northumberland) 1991
3) Hall, I, 2013. Relics of War; A Guide to the 20th Century Military Remains in the Northumberland Landscape. Wanney Books (38)
4) This record includes National Record of the Historic Environment Information provided by Historic England on 4 January 2021 licensed under the Open Government Licence [http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/]
4a) Gazetteer of Defence Sites from the Henry Wills Collection