Hi,
A great many moons ago, when I was a teenager actually, I obtained a footplate pass from BRand had a ride on an M7 tank from Ryde StJohns road down to Ventnor and the other roue, out to Newport and Cowes, all on the Isle of Wight. This was just befor closure of Wroxall and Ventnor section and complete closure of Newport/Cowes line under the Beeching cutbacks of non-viable routes.
The journey from Wroxall to Ventnor was an experience! Most of it was in a tight fitting tunnel under Knighton Down and the tunnel had a bend in the middle so you couldn`t see the other end. It was absolutely choking on the footplate with brown sulphurous gases/smoke.
Ventnor was in a bowl shape carved out of the chalk, rather like the Chalkpits museum, West Sussex. Down the West sidewall, large caves had been hewn. I dont know original use for them but when I was there, some were in use for coal merchants storage.
When we came back from Cowes and entered the Junction with the Sandown/Shanklin/Ventnor line, said junc. having a speed limit of 40MPH, the well-worn tank was making a deafening racket, jerking the pole reverser backwards and forwards.
Happy memories!
John.