Trident was certainly fast, but not for long!
IIRC, the Trident 1E was delivered to Iraqi Airways (remember them?) by Hawker Siddeley (remember them?) with a guaranteed 85 pax from Baghdad to Cairo on an ISA+(XX) day. The reality was 16 pax in representative summer temperatures!
The Trident only oprated for ten years before the 727 replaced them in IA service!