Mike,
Going back to the first post of this thread, here is the one supposedly depicting a Centurion engine change.
Closer inspection however, shows what I believe is a truck engine hanging from the block and chain, not a Meteor.
The tank appears to be a Mk 5/1 with a Type B barrel. There is something strange between the bin boxes on the left side of the turret, covering the ammunition loading hatch.
There's also the strange placing of the road wheel on the back of the 100-gal tank. Most photos from this time period (mid-60's) show the road wheel located on the rear of the turret where the track-link holders are.
It also looks like the infantry telephone is on the rear of the fuel tank, rather than the left side.
I'm sure the Centurion spent as much time in the field in this environment as it did on the ranges and in laager.
Cheers,
Dan.