any official Blackburn or MoD air-to-air photos
Amos , check out ebay Uk right now, look at Item number: 280843243304.
It is a beautiful air to air by 'the' Charles Brown. They don't get any better than that. Let us know how you get on.
Also check out item 290681477732 which for some reason doesn't show up under the BB search, and infact appears to be the same aircraft 'K' shown above and probably at the same location.