Both Servisair and Aviance have to tender for their LGW licence this year( 7yrs are up). New entrants can also apply.
Be very surprise if either lost the right to operate from LGW, due to the experience, and number of staff they employ.
Aviance seem to be on up at LGW, with I think every new contract going to them recently, and they have regained their good reputation.
Rumour has it that Menzies are looking at a EasyJet self handle partnership....it would be a big blow to Servisair