I remember in the 70s a large number of viscounts and Heralds ; What a great noise they made
BMA could have 3 or four viscounts parked up on a saturday , EMA, BHX LTN and SEN
BIA had heralds from Exeter , Southampton and Gatwick
British Airways viscounts to LHR and MAN
Dan Air HS748s to Bournemouth, Leeds, Bristol
Intra Airways ; DC3 to Gloucester and Cambridge
Aurigny ; Trislander and Islander only to AUR, JER Dinard and Cherbourg