Me (non-eu national) and my wife (eu-national) are currently living in Ireland, 2 years ago I was granted the EU1 fam card for 5 years in Ireland. I am working and my wife is on maternity leave at the moment (we just had a baby boy

The question is, what would be the process for me being able to work in the UK as soon as we move there? Can I work there from the very first day or is there some kind of permission that we have to apply for to in advance?, if so what would be the requirements for the permission and how long it takes.
We would need also to consider that I would be the one supporting my wife as she wouldn't be working for at least the first year.
Any information will be greatly appreciated.
Cheers