I was a regular user of the MAN-LHRshuttle between 1979 and 1986 and through variousconnections had a number of jump seat rides. Thus my knowledge of the decommissioning. You are right about the inop placards! The last timre I remember hearing the fourth engine used was at GLA sometime around 1980 and I have no knowledge of use on the MAN shuttles from around 1979. Towards the end of Trident ops I had the luck to be on the last commercial flights of 2 Trident 3s.