I think the restriction after IAG takeover was no reduction on Shannon and Cork to LHR for 7 years, and none ex DUB for 5 years but I could be totally mixed up there.
As regards LCY and the A220, LCY can only handle 2 at a time on the ground due limited apron space. SWR run them in their already, I think AFR are due to shortly, not sure about Air Baltic. With the failure of the Sukhoi and the E2 apparently not stacking up financially compared to the A220, it might start appearing in quite a few European fleets
And I totally agree Cork is doing well. Fastest growing airport in the country, great to see.