This is a bit of just a thought process, but I am interested in peoples opinions.
In OTL there were discussions between London and Dublin in regards to Ireland joining the war, or at the very least letting the Treaty Ports be used, in return the British Government was offering to support the principle of a United Ireland:
www.historyireland.com
www.irishtimes.com
Now for various reasons (some right, others not) the Cabinet turned it down, and realistically it seems doubtful London had thought things through given the predictable Unionist response to just the suggestion of the offer.
But for the purposes of this thread (again just kind of thinking things through), I'd like opinions of what impacts if the offer had been accepted?
At the same period of this offer the RAF had drawn up plans for a deployment into Ireland with the suggested strength of 5-7 Squadrons, two Battle Squadrons and the rest Hurricanes. Given the virtual nonexistence of the Irish Air Corps, this strength would have had to come from the UK squadrons, so how would that have affected the Battle of Britain with perhaps up 5 squadrons of Hurricanes not being available? The same study planned to set up a new Radar chain in Ireland as well, would that have had an impact on the trained crews of Chain Home, having to stand up new stations over a period?
For the RN, while they would have had the Treaty Ports back, both Lough Swilly and Berehaven hadn't had improvements that Cobh had and were areas that were heavily Republican, while on the other hand Cobh had lost pretty much all the labour force that supported the RN during WW1, and critical dock infrastructure had by this stage already been disabled leaving Cobh basically a marshaling area and not much else. Post Fall of France would there be enough spare hardware like AA guns to defend the Harbour if it was being used heavily?
Meanwhile of course NI is likely to have reacted as NI does to such an offer from London, even though London had admitted it wouldn't force NI into a Union with Ireland, could you see an impact from the major war companies of H&W and Shorts? Given they tended to lean Unionist/Loyalist could you see anything from "Go Slows" to active Strikes, impacting everything up to Fleet Carriers?
If this had happened, has the UK actually created more short to medium problems and burdens for itself instead of benefits?
In OTL there were discussions between London and Dublin in regards to Ireland joining the war, or at the very least letting the Treaty Ports be used, in return the British Government was offering to support the principle of a United Ireland:
A declaration to be issued by the United Kingdom government forthwith accepting the principle of a United Ireland.
A joint body including representatives of the government of Éire and the government of Northern Ireland to be set up at once to work out the constitutional and other practical details of the Union of Ireland. The United Kingdom government to give such assistance towards the work of this body as might be desired.
A joint defence council of representatives of Éire and Northern Ireland to be set up immediately.
Éire to enter the war on the side of the United Kingdom and her allies forthwith, and, for the purposes of the Defence of Éire, the government of Éire to invite British naval vessels to have use of ports in Éire and British troops and aeroplanes to co-operate with the Éire forces and to be stationed in such positions in Éire as may be agreed between the two governments.
The government of Éire to intern all German and Italian aliens in the country and to take any further steps necessary to suppress fifth column activities.
The United Kingdom to provide military equipment at once to the government of Éire.
The British Offer to End Partition, June 1940
most intriguing episodes in the history is the British proposal in June 1940 to end partition in return for Ireland’s participation in war against Germany.

Britain offered unity if Ireland entered war
New documentary evidence detailing a British plan to guarantee a united Ireland if the government agreed to enter the second …
Now for various reasons (some right, others not) the Cabinet turned it down, and realistically it seems doubtful London had thought things through given the predictable Unionist response to just the suggestion of the offer.
But for the purposes of this thread (again just kind of thinking things through), I'd like opinions of what impacts if the offer had been accepted?
At the same period of this offer the RAF had drawn up plans for a deployment into Ireland with the suggested strength of 5-7 Squadrons, two Battle Squadrons and the rest Hurricanes. Given the virtual nonexistence of the Irish Air Corps, this strength would have had to come from the UK squadrons, so how would that have affected the Battle of Britain with perhaps up 5 squadrons of Hurricanes not being available? The same study planned to set up a new Radar chain in Ireland as well, would that have had an impact on the trained crews of Chain Home, having to stand up new stations over a period?
For the RN, while they would have had the Treaty Ports back, both Lough Swilly and Berehaven hadn't had improvements that Cobh had and were areas that were heavily Republican, while on the other hand Cobh had lost pretty much all the labour force that supported the RN during WW1, and critical dock infrastructure had by this stage already been disabled leaving Cobh basically a marshaling area and not much else. Post Fall of France would there be enough spare hardware like AA guns to defend the Harbour if it was being used heavily?
Meanwhile of course NI is likely to have reacted as NI does to such an offer from London, even though London had admitted it wouldn't force NI into a Union with Ireland, could you see an impact from the major war companies of H&W and Shorts? Given they tended to lean Unionist/Loyalist could you see anything from "Go Slows" to active Strikes, impacting everything up to Fleet Carriers?
If this had happened, has the UK actually created more short to medium problems and burdens for itself instead of benefits?