Britannia 767 demo
If I remember correctly the first 767 demo for Britannia was due early one morning.
We knew something was up when loads of the bumblies (9-5ers) turned up early!
Luton's weather played its usual role and I think the aircraft diverted to Milan?
That was when it was going to be 260 seats (so simple for 2 x 737's to back it up), then commercial got involved and then it went to 273, so if it was tech you always had a few people left over!
Sorry memory mode off!