[GabriellaG]

The fact you think they give notice/warning of changes.

We all thought that was a given or a normal before we started this process - how wrong we were.

Ooooh yes haha. Having gone through my fair share in the UK with obtaining my British Passport after Brexit I am well aware now of how on the ball you have to be with Home Office.
Just reading up on the proposed changes they are looking to bring in on approving the sponsor. Doesn't cause me great concern as he will definitely be approved however it just means like you said - it will take longer now.
Thanks again for your help everyone