This is a tricky situation:
- will your UK provider transfer your value to an Irish Buy Out Bond? You need to check.
- what transfer value will the UK scheme offer?
- is the Transfer Value fair compared to the DB being foregone ( you might need professional advice)
- currently Sterling is low versus the Euro, but will the exchange rate improve post Brexit?
- would you be better diversified by having an Irish DC fund and a Sterling DB Pension?
Having ascertained what Transfer Value the UK schemes might offer, I think you will need professional advice to compare and contrast.