1968, first foreign holiday by air (had been to Paris with the school by ferry/train) was to Rimini (with a girl!!!) except we didn't fly to Rimini. It was in a Britannia from LTN operated (I think) by Monarch and we flew to Turin with a long coach journey to get to the resort.
Second foreign holiday in 1969 (with the same girl) was to Majorca flying to Palma, again in a Britannia this time from LGW but I can't remember the carrier. I do remember sitting on the ramp at PMI casting envious glances at the Channel Airways Trident on the adjacent stand! It was the height of modernity compared with our Britannia.