We removed lots of the bits and pieces. There were lots of these little metal "caps". Anyone any idea what they might have been?
There were also quite a few of the old lamp shades on the floor, only one of which is still hanging.
This is the strange canister that appears to be designed to be worn on someone's back. Plant sprayer or bee fumigator (there's a beehive in the back too remember)?
All this clearing enabled us to sweep up the floor a bit half way along. The concrete underneath the thick layer of dust and rust particles was smooth and dry.
A few more pictures of the tunnel from today:
I haven't really attacked the front yet. I need to deal with all the tangled barb wire in order to get to the floor underneath, and whilst I could laboriously cut it up into small pieces, I can't help but think that it would be easier to remove it in one tangle once the doors are fully open.