That picture where he is looking at the Churchills. There are rows of Valentines in the background. I can't find any mention of Polish units equipped with Churchills. Probably a large-scale joint exercise. I do like the France 1940 picture

I don't think that I've seen a Renault UE and a Bren carrier in the same column before. There can't have been many Poles in the BEF surely?
Edit: Just checked in "The Black Devil's March" by Evan McGilvray and a Polish 10th Armoured Brigade (really only a partial, Mechanized Cavalry Brigade) was already operating in exile in France in 1940, with the French army and not the BEF.