Two that I remember involved Kinloss Nimrods. Firstly in the early 70s, more tail art than zap, the Fincastle Trophy winner had,on it's tail, John Bull throttling a Kiwi with one hand, crushing a Maple Leaf with the other and had his foot on the neck of a Kangaroo. The second was, I think XV260, in Gibraltar during a NATO exercise, when it was decorated in 120 sqn colours being zapped, or carefully adapted, by Trembler groundcrew so that it became a 111 sqn aircraft. (CXX into CXI)