http://www.viewlondon.co.uk/review_959.html
"Winterbottom apparently shot over 100 hours of footage, all on digital video and much of it improvised..."
IMDB isn't wrong, just misleading. Apparently the movie originated on DV but ended up on 35mm.
thanks jpbankesmercer. Hey, you should know; you're from Manchester! BTW, Coogan is a God, my favorite English comic behind Gervais (at the moment). isara, that this movie was shot on DV is an interesting bit of trivia, but it doesn't matter; the movie rocks. One of the best biopics in a long time.