I was 'fortunate' to control Varities on my first tour at Strubby, and even had a couple of hours driving them when they needed a co-pilot for Air Tests and the like ... and all the proper co-pilots were busy flying with Students. Both I and my plt off mate in ATC even had our own flying kit on the sqn, and they would phone the Tower and ask if one of us was 'free to give them a hand'.
Happy days