Originally Posted by
DaveReidUK
Yes, but in those days, the train took all day.
By 1968, the 13 daily Vanguards had gone done to 7 plus 5 Tridents, so capacity was already reducing significantly.
Interesting also that in those days GLA/LHR had about a third more flights than EDI/LHR, whereas nowadays there's little difference in capacity.
BEA were forced to replace some Vanguard services with Comets and Tridents starting 66 due to competition from British Eagle and British United 1-11s on the route starting 66. BUA from LGW