Political effects of Southern Ireland remaining in the UK

In the 1910s this would have meant to basically hand over power over the island to the IPP, who held 3/4 of Ireland's Westminster seats.
Would they have won that at the GE where IntDev was in play? Like OTL devolution it won't be all laws and one would assume rules around observer status for the other MPs.
 
Would they have won that at the GE where IntDev was in play?
In this scenario, the IPP's strength would have been one of the reasons for devolution and I think it's logical to assume they continue winning the majority of Irish seats in the GEs around the IntDev decision. Later, after this issue is settled, unionist parties are likely to increase their vote shares but initially the IPP will have a lot of power, especially thanks to the FPTP system which mutes the considerable southern Irish unionist minority. At some point after devolution, after reaching their main goal, Irish nationalists might split up, considering how factionally divided their movement was, and their power will decrease.
So I think that for the short term the IPP would profit from devolution, but in the long term it would allow unionist parties to gain ground in Ireland again. Whether devolution takes place or not depends on the interests of the Westminster government. Will they be willing to take a short-term loss in order to have a long-term advantage?
 
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