oscarh
Yes two 748's did go ogg the grass runway in a singlre day. The grass had not be properly cut as I remember. However the source of my information about the Scottish Flyer was "Brtiish Independent Airlines since 1946" written by Tony Merton Jones. It even includes the phrase "on October 9, 1967 1-11 G-AVGP operated a proving flight over this route(with the exception of Portsmouth). It also says that 748's were used and this would have enabled Portsmouth to be included. I agree that even Channel would have found Viscount operations to have been impossible at Portsmouth.
Historically the possible winner was Pan Am\'s Round the World flight from JFK. PA1 went eastbound and PA2 went westbound. Can anyone recall the exact points of call?