This staffing issue is what happens when pay levels are pared to the bone! The turnover of trained staff whom find better alternatives in pay and working conditions will continue until those pay levels are addressed adequately.
As with the Passport slowdown there is a similar slowdown within Disclosure Scotland that check Airport workers for Criminal Record checks etc. I'm told the backlog is something like ten weeks before any new employees can get their Airside pass ID's.
Therefore, I can't see much is going to change in the short term.
The public wanted cheaper flights and they have them, but don't care about the quality of service until they start waiting four hours to collect their baggage!
Oh dear! Never mind.
I have no connection with Swissport formerly GroundStar in any way, but can see what is happening at Gatwick on a daily basis.