No such thing as a coincidence...hot off the press from BA site moments ago.
Have a look at the GPM results for SFG Longhaul.
In particular look at the customer complaint to compliment ratio.
You will find that the results are way behind LHR longhaul.
This was not the case when I was at LGW Three years back.
I think this is due to the fact that the CSD role has been removed at LGW
And the crew managers are part of the service.