I'm not so sure about that last comment (more jobs at Rolls-Royce).
Aren't the BA 744s all RB211-powered? Methinks Rolls relies on the sale of spare parts for the maintenance of these, and usually with a freighter conversion, utilisation drops quite a bit, so maintenance is less frequent, therefore less parts sales...
Of course, selling new Trents on the 777s means (eventually) substantial parts/service sales on those, but it takes quite a few years to build up a reasonable revenue...
I suspect Rolls has quite a few jobs yet to lose.