At this point, BEA decided that the Trident was too short-legged for its ever-expanding routes, and that an even longer-ranged version was needed.
Hawker Siddeley responded with another upgrade designated Trident 1F. It would have the Spey 511 engines, a 2.8 m fuselage stretch, a gross weight of 132,000 lb (60,000 kg) and up to 128 seats in the original five-abreast configuration.
BEA planned to buy 10 1Fs, plus an option for 14 further aircraft.

As work continued on the 1F the changes became so widespread that it was renamed the Trident 2E, E for Extended Range.
Now powered by newer Spey 512s with 11,930 lbf (53.1 kN) thrust, it also replaced wing leading-edge droop flaps with slats, and extended the span with Küchemann-style tips.
It had a gross weight of 142,400 lb (64,600 kg) and a 2,000 miles (3,200 kilometres) range.

BEA bought 15, while two were bought by Cyprus Airways.
CAAC, the Chinese national airline, bought 33.
The first flight of this version was made on 27 July 1967 and it entered service with BEA in April 1968.
At this point, BEA decided that the Trident was too short-legged for its ever-expanding routes, and that an even longer-ranged version was needed. Hawker Siddeley responded with another upgrade designated Trident 1F. It would have the Spey 511 engines, a 2.8 m fuselage stretch, a gross weight of 132,000 lb (60,000 kg) and up to 128 seats in the original five-abreast configuration. BEA planned to buy 10 1Fs, plus an option for 14 further aircraft.
As work continued on the 1F the changes became so widespread that it was renamed the Trident 2E, E for Extended Range. Now powered by newer Spey 512s with 11,930 lbf (53.1 kN) thrust, it also replaced wing leading-edge droop flaps with slats, and extended the span with Küchemann-style tips. It had a gross weight of 142,400 lb (64,600 kg) and a 2,000 miles (3,200 kilometres) range.
BEA bought 15, while two were bought by Cyprus Airways. CAAC, the Chinese national airline, bought 33. The first flight of this version was made on 27 July 1967 and it entered service with BEA in April 1968.
Hawker Siddeley Trident