Many thanks for the kind words all, Pinky - yes, it's the Sherman IC kit, (clearly I had a hard of thinking moment there) - I also think you're correct about the cheek applique armour. While the kit's instructions do use it, I've not subsequently been able to find images of IC's with it - I thought it might have been because they all seemed to be early Fireflys in Italy (2nd & 4th Polish Armoured Regiments in Loreto & the 2nd New Zealand Division in Trieste) - but then an example from the 27th Canadian Armoured Regiment (Sherbrooke Fusiliers) in the Netherlands in '45 turned up. I guess I'll have to put that one down to experience...
I suppose the image in my head of the Firefly is the VC, which do tend to have the cheek armour - that's my excuse & I'm sticking to it
There's another question that's occurred to me while looking at reference images, what's with the British Armoured Corps attachment to giant toolboxes? There are many pics of vehicles mounting a toolbox so large that it would surely be a two man job to move it:
I'd like to think that there would have been an Australian crew member, who, upon looking pityingly at a US or German vehicle & saying (in his best strine) "That's not a toolbox mate, this is a toolbox."