I took aerial photos from the plane on my trip back from SOTM in Amsterdam to Birmingham.
The images are free to use and can be found on my server below. The approx centre of each image is provided in the accompanying csv file.
Photo 82 is closest to the airport and 43 (the last one in the csv file) is over near Northampton, the lower numbered photos are probably too low res (due to height of plane) to be of much use.
I suspect that it may be possible to rectify some of the images for use in JOSM using http://labs.metacarta.com/rectifier/