"According to English Heritage there were 4 levels:
B = Bastion (Closed after a collapse which killed some people, now lost)
F = Foundation (Apparently never even started but then who knows, so much mis-information, and still lots of secrets to be uncovered I think in and around Dover Castle)
If you dig around for information on these tunnels you'll get loads of conflicting information, EH don't exactly tell the whole truth and nothing but, take DUMPY for instance on a recent tour of the tunnels, we actually asked about access and were told by the guide that it cannot be opened to the public because of problems getting people out in case of a fire, hmmmm, well if it was going to be used as a cold war command post I'm sure there'd be more than one way out, and according to official plans I have there looks to be several. Oh then there's the 4 types of deadly fungus spores found down there, lets not forget the asbestos risk, flaking lead paint, the list is endless depending on what articles you read.
I've been down, Annexe, Casemate, and Esplanade, DUMPY is high on my list but the one that really fascinates me is Bastion. According to the same tour guide, who was very surprised we even knew it existed, EH cannot find it
apparently they have a fair idea where it is but when a team was brought in to uncover it they found unexploded bombs/shells and abandoned digging. According to others it was never even started, it collapsed, it killed the workers used to dig it, it still carries possible traces of 'the Black Death', the list is endless."
This is really interesting- would you mind telling me where you got the idea that people were killed in a collapse in Bastion?
I have been told that there is subsidence damage to the officer's mess and as that is the most likely site of Bastion I would be intrigued to know if there is a link.
I also think I may have found some new evidence in the form of a 1946 Ministry of Public Works plan that shows a track into the East moat (service tunnel) and what are supposedly magazine entrances that don't exist anymore...