All our best wishes for your wife.
The sad truth is that anything we could contribute to this topic is just as meaningless as anything the EK representatives of any level will or can give you.
The goal posts change unilateraly and almost on a monthly base and if it costs something only to the employees detriment.
Do not trust any statement. Even if it is in written, contracts are only for decoration in this part of the world.
If you can, stay in the UK.