Yep, Harrison and Jamie got it. It's a B25C Mitchell II. This is the one which becam known, in the UK, as Grumpy. The pics were taken circa 1988, just after it arrived at Duxford, UK, before being painted in RAF colours. The aircraft is rare in that it was actually one of a batch to serve with the RAF, although most of the war it was in Canada as a training aircraft. Got the serial and details somewhere!