I might be wrong but I am sure that I heard the reason why there are 3 main crew in First at LGW but the PSR remains at LHR is that there is not enough First trained crew at LHR to allow 3 main crew o be in the cabin, but am I right that at LGW crew are trained in First quickly? I think this might have been in CCNews or something as someone did ask why is there a PSR in First at LHR but at LGW there is a Purser and CM in Club...