First real solo, just like OAP, was in a Kirby Cadet Mk III, only mine was from RMB Condor in Arbroath. Lovely day and I still remember looking out to sea on the downwind leg and the view of the airfield. Can't remember the date though but probably 80/81.
First jet solo. JP 3. RAF Elvington. 1983. Don't remember whether I had a sleepless night but I still remember the weather, the view of the empty seat next to me, the circuit itself.
Can't remember all of the first solos that I have authorised - after the event. And sadly can't remember who was the first person I sent solo or where it was, but I do remember sending first solos at a number of airfields and standing in the tower watching them go.