It used to be a regular event that the Cadets at Cranwell used to go down to the RMA at Sandhurst and nick on of the cannons that sit outside the academy to later place it outside College Hall. A flight commander while I was on IOT was keen to resurrect the tradition and several of us where primed to go and do the deed. However, as this was the height of IRA bombing campaign and the RMA was being protected by live armed Ghurkas, we decided against it.
Does anyone older than me remeber nicking a cannon? Apparently, they were usually bought back by train. One such event had the Cranwell cadets wheeling the thing through the streets of London!