It'd be quicker to work and live in Ireland for a few years and then get citizenship ? ???
Waiting to successfully rejoin the EU would be a longer term open ended strategy surely ?
You need time or money.
Ireland is a good route in as UK citizens can still work there automatically ( but you don't then get EU citizen rights to move elsewhere ). So you'll need to get a job there, live there and try to eventually get citizenship.
You'll need £20K - £25K or so CASH in the...