Canadian Churchill VII question

[t3488g]

I am building a WWII 1/35 scale diorama and i built a churchill VII Crocodile and plan to paint it as a canadian churchill.

So here is my question:
What regiments/ divisons used Churchill VIIs and where in europe. I was going to do the 1st Canadian tank divison (calgary tanks) but after reading a book about the canadian armoured corps, calgary tanks were in dieppe(they were Churchill IIs and IIIS, so that wont dew), and sicily. Where churchill VIIs used in sicily? Were Calgary tanks in western europe? I know Calgary tanks used the Churchill VII Crocodile because there is one at the museum of regiments.

Also the german figures that came with my pak 40 and hanomage have gas maske cases on their back, gas was not used during WWII so were these not worn during the later years?