Nice shots there Les. Interestingly they are all Mk 1 despite the barricade rams which were fitted to both Mk1 & Mk2.
The thing at the top is a light, they were also fitted to Rovers.
The other stuff on the roof is a roll of barbed wire & a frame for a road sign for VCPs etc
The Mk1 ambulance is nice, but when it was uparmoured to Mk2 spec that one became an APC.