- Archived: York - 20 Group ROC HQ - (York Group) - 2008
- Archived: Leeds - 18 Group ROC HQ - (Leeds Group) - January 2009
- Archived: York - 20 Group ROC HQ - (York Group) - July 2010
- Maidstone - 1 Group ROC HQ - (Kent Group) - Jan 11
- ROC HQ no 1 Group Maidstone -Inside the bunker-Kent -Feb 2012
- Info: Oxford: ROC HQ No. 3 Group - Original Photos 1992