2TWU @ #23
It was similar in 1962 with the Nav School Varsities. The 9 aircraft departed on the same route at 15 min intervals, and arrived at Dursley, for return to Hullavington, at random spacing dependent on the capabilities of the various student navigators.
A gentleman (retired Colonel no less) living near Dursley regularly telephoned with complaints about low flying aircraft, complete with all of their numbers. The aircraft numbers were on the underside of the wings and were about 3 feet high. The complaints only came on days with a high cloud base. The Varsity stream/gaggle was at FL60.
Eventually the RAF Police went to his house (on a day with a high cloud base) and took photographs of him sitting in an armchair in his garden copying down the aircraft numbers with the aid of a telescope! The Station Commander's letter explained that if did not use a telescope perhaps he wouldn't have a problem.The complaints stopped.