Irish participation and Atlantic air power

How would Irish Dominion status or wartime cooperation affect British operations?

It would add western basing, training space, and aircraft reach, making Irish territory a useful rear area for Atlantic operations.

Waterford appears more useful than Dublin in this counterfactual, though the wider benefit is geographic. Airfields and training sites in Ireland would sit farther west, while aircraft could move quickly across the Irish Sea. That added depth would support Atlantic operations. It would also reduce the pressure created by basing everything close to Britain.