TTT once we are out of the EU an EU licence will be treated as any other foreign licence. You will be able to use it in the UK for visits (6 months a time limit I think) and as a temporary licence for the first 6 months if you move here permanently. I lived in Zambia and passed the driving test there, I was allowed to use it for the first 6 months after I returned to the UK. I also had an international licence issued against my Zambian licence which I could use here, not sure of the time limits though.