XL 573: though I was on the same DFGA course as Wholigan, I did not fly 573 then. However....... in Jan 67 I did the Hunter IRE course, a whole bag of fun - flying from the right seat but using the left instrument panel. I still have that crick in my neck. Seven of the 17 trips were in XL 573, three of them mutual with Horace Farquhar-Smith (the other half of 135 IRE Course), the other 4 with Pete Maillard, the QFI/CIRE who ran the course alone.
My logbook confirms that the Chivenor fleet number was 97.