I see no problem with moving your funds to UK. In the year that you open a foreign bank account, you must declare the details to the Revenue here.
The double taxation agreement entitles only the country where you are resident to tax the deposit income. So, if you continue to live in Ireland, you would not pay the UK DIRT equivalent. It can be a lengthy process however, to complete the forms which seem to boomerang from UK Revenue authorities to Irish and back again. If you intend taking up residence in the UK I would wait till then to transfer the funds.