On that interesting Polish site that cropped up in 'name that vehicle'
Czołgiem!
There's a link to pictures of the site owner's Grandfather's service that Bod just pointed out to me:
Władysław Gerula
Remarkable shots of assorted Armour; from Polish vehicles, through Valentines, Churchills, Shermans and several points in between (Including an AA Crusader). Also quite a few shots of 'regimental' activities & the carnage around Falaise... and this rather alarming Firefly:
Sadly my Google translator doesn't extend to Polish yet, but it's well worth a look.
Cheers,
Adam.