Nothing to indicate what the other is about, PR role perhaps?
The top photo was taken for RAF Wyton's "Welcome" booklet which was issued to you when you arrived at the station. I still have mine, received it when I was posted in to 51 Sqn in 1965. The picture appears on page 5 of the booklet and shows the main aircraft that were then based at Wyton - a 543 Sqn Valiant, a 58 Sqn Canberra
PR.9 and a 51 Sqn Canberra B.6(R) (bottom aircraft).