Teeteringhead - absolutely correct, of course!!
The joys of a memory which is receding rather faster than the hairline! Ah well, I did at least remember to get up today ... I think
PS - I'vejust been scanning some old slides from that era, a couple of which , at first glance, appeared to be a flock of birds. Once they were enlarged they were rather poor shots of a large 'formation' (same way, same day) of Sioux and Whirlwinds. Wracking the few remaining brain cells dredged up a faint memory of some sort of mass flypast celebrating some particular occasion but details are totally absent! Anyone remember this?