I was there but as far as I recollect I don't think that a PanAm 707 landed, it certainly wasn't there Christmas morning, most of the overseas visitors turned round and went back home but the BEA Viscounts stayed parked on 33 and the eastern taxiway, the problem was that there was only one tug and ground power unit until some more were brought by road from Heathrow.
I was in Belfairs woods when the first arrivals came in about 1100, we jumped on our bikes and hot footed it to the church wall where we used to meet to collect registrations!!