Attached is a picture from WW2talk, courtesy of James Nightingale jnr.
"Bill Wyatts tank brewing up at Arnhem"
source:
http://ww2talk.com/index.php?threads...y.13221/page-2
Judging from the bracket on the turret side this looks a lot like the same Crab as in Jon's picture. It's 1st Lothian and Border Yeomanry.