As a postscript to the Trident 3 booster engine decommissioning debate, I've been re-reading Max Kingsley-Jones's excellent monograph on the Trident.
He recounts a jump seat trip he made to Oslo during the last month of BA Trident operations (December 1985), where the boost engine was used not just on the return leg (where it was essential in the Norwegian winter) but also on takeoff at LHR to confirm its serviceability.
The book contains a number of photos of the RB162 in action (discernable by the open intake doors), including a May 1986 shot of the last of the 5 T3s sold to ACS of Zaire, which was the last ever Trident flight from LHR.
