Typical that Theresa May has bowed yet again to her DUP overlords. She says abortion legislation for NI is an issue for Stormont, knowing too well that 1) Stormont isn't operational and 2) Even if a majority of Stormont MLAs voted in favour of legalising abortion, the DUP would use a petition of concern to block it.
This is spineless 'leadership' and all the more galling coming from a woman.
Not really quite that simple, there are "devolved" matters, "reserved" matters and "excepted" matters. the first are what they say they are, matters for which responsibility has been passed from Westminster to Stormont via the NIA. reserved are things which, for the time being, are retained by Westminster, but may be devolved at some point. Excepted are those which Westminster will always hold.
Abortion is a devolved matter, and to legislate on a devolved matter Westminster will have to play around with the NIA. That won't go well with many (not me, I'm all for it), but it isn't just as cut and dried as "May should just do it".
Even if by some miracle we did get Stormont back up, and the members at least pretending to earn their salary, the latest (failed) negotiations had a complete re-working of the Petition of Concern so that no one party had an effective veto. Foster and her crew knew that would allow marriage equality, but were content that they could save face by tabling the petition and voting against, only to be defeated by a majority vote on the floor. So the PoC thing shouldn't have the same impact if and when they are back.