Local
- Friends of Dover Castle dover-castle-friends.org
- Fort Burgyone thelandtrust.org.uk/space/fort-burgoyne
- Crabble Corn Mill ccmt.org.uk
- Destination Dover destinationdover.org
- Dover Society doversociety.org.uk
- White Cliffs Countryside Project whitecliffscountryside.org.uk
Kent
- Kent Underground Research Group kurg.org.uk
- New Tavern Fort visitgravesend.co.uk
- Gravesend Bunker visitgravesend.co.uk
- Shorncliffe Redoubt – shorncliffe-trust.org.uk
- Martello 24 – theromneymarsh.net/martello24
- Heritage Open Days – www.heritageopendays.org.uk
National
- English Heritage english-heritage.org.uk/visit/places/dover-castle
- National Trust nationaltrust.org.uk/the-white-cliffs-of-dover
- Shoreham Fort shorehamfort.co.uk
- Palmerston Forts Society palmerstonfortssociety.org.uk
- Fortress Study Group fsgfort.com
- Fort Nelson royalarmouries.org/visit-us/fort-nelson
- Slough Fort sloughfort.org.uk
Donations