Coffman's information is, as usual, spot-on. Bear in mind though that the UAS's had all lost their Chipmunks by the mid-1970's, these being replaced by the Bulldog.
The only other "early 1970's" candidate for 7 AEF that I have is a photo of WP837/L, undated but captioned as 7 AEF.
In answering Nuasaea's original query, I confess I never thought to look in The Tome! In my defence, the UK section was (well) written by the the other Rod....