As an ex-Brat, I am reminded of a tale told by one of the Halton instructors, more than 40 years ago now. He was on a Shack squadron and they were taking part in a big maritime exercise somewhere in Australasia. As well as the Brits there were squadrons from Oz and NZ.
The said base had a huge water tower and during the first night of the exercise the Kiwis nipped out and painted a huge Kiwi on the side of the tower. The following night the Aussies nipped out, painted over the Kiwi and replaced it with a huge image of a kangaroo. Naturally, on the third night everyone was full of expectation - what would the Brits do? Much to everyone's surprise, the following morning the kangaroo was still there. However, on looking more closely they saw a ball and chain painted around the kangaroo's leg!