From my understanding, it's just the UK arm of Menzies aviation that has allowed itself to deteriorate to an unsustainable position due in part to agreeing contracts that they are then unable to fulfill with any meaningful return. Both Menzies and Swissport have been slitting each others throats for the last 6 - 7 years, which, is great if you're an airline accountant, but has had the negative effect of poor yields within the business, extremely poor working conditions for the staff, A poor service to the customers and a damaged reputation.
There has recently been changes at the top within the U.K arm of Menzies aviation with some being shown the door for the above reasons. Will this mean changes to come ! - wait and see.