Hello.
Some of you might have been here before! But it has an English side to the site. If you punch in Tanks! Pages 65 and 66 have nice images of the Vickers Dutchman! Also you can find some views of operational Challengers. Along with a few shots of various Shermans. A couple of Crabs too!
http://www.beeldbankwo2.nl/index.jsp
JohnO