This from the Irish Times last year suggests that Sinn Fein would improve the defence forces of the Republic but (perhaps) stop RAF over flights - we shall see.............................
Pat Leahy
Mon May 8 2023 - 19:00
Sinn Féin has said it needs more information about the secret defence arrangement successive governments have operated with the British air force before it decides whether or not it would scrap the agreement if in government.
The party’s foreign affairs spokesman, Matt Carthy, said news of the arrangement,
reported in The Irish Times, “simply further exposes the abysmal failure of successive Fine Gael and Fianna Fáil governments to invest in our Defence Forces and to ensure that, as an independent, neutral state, we can monitor and defend our airspace and our seas”.
Mr Carthy said that he has “sought a briefing from the Department of Defence on this matter, so as to clarify the legal and constitutional matters that have arisen from today’s report” but he also urged Tánaiste Micheál Martin to make a public statement on the issue.