Looking at return prices from DUB-MAN, Man United, at the very least, are playing at home so prices are way higher than the £10 I was expecting
Some flights are heading towards £300 with Aer Lingus.

No rush, so €77/£68 with BA via LHR is a decent enough deal.

On Ryanair, 1a/b/c is open to the exit. Row 2, d/e/f has a bulkhead of sorts (cupboard / back of galley).
No 1d/e/f.