Yes, Those companies do indeed serve LHR
. In addition, off the top of my head, i can think of AFS who fuel at LHR
.. one of the main players!
handle East african out of T1 after previously selling off their handling division (now aviance) !! SAS (SK) also deal with Etihad, Varig, and Air Baltic out of T3
There maybe more I know of, but its late, and im an early shift tomorrow with no sleep. Too tired to think!!!
I'm sure you lot can fill the gaps in..!