If the PoD is Thatcher defeating Heseltine in the first round then I think there are major butterflies for the Tories themselves. You can see among parts of the Tory Right and in UKIP that there's practically a Dolchstosslegende that if Thatcher hadn't been ousted she would have vetoed Maastricht strangling the EU at birth, everyone would have learned to love the Poll Tax and she would have beaten Kinnock and gone on and on. In truth she had lost the plot by the middle of her third term and had become an electoral liability. So if she is the one who leads the Party to defeat then her aura of an Invincible Boadicea is destroyed, I think Maastricht would still have happened, Thatcher was more pragmatic on Europe than her modern acolytes realise and I think she would have obtained roughly the same deal as Major.
Labour still has a major electoral mountain to climb in 1992 so its most likely a narrow majority or a coalition with the LD's, if the economy has gone as IOTL then you've still got the pressures that led to Black Wednesday are still there, Labour with John Smith at the Treasury is probably even more committed to the ERM. He would probably have done exactly the same as Lamont with probably the same outcome, the result in terms of the Government's credibility is about the same, its honeymoon will be over and the press will be merciless. Another potentially significant butterfly is that Nigel Farage decided to go into politics because of the events of Black Wednesday, if its a Labour Government does he still do that? If not then if UKIP still exists ITTL it may still be a fringe party.
I don't know enough about how Labours foreign policy would have developed but Northern Ireland could have gone very differently. Kinnock's Secretary of State would probably have been Kevin McNamara, a close friend of John Hume, a big supporter of Labour's traditional policy of Irish Unity by Consent and a real bogeyman for Unionists. Paisley would have had a field day with him in Hillsborough Castle, the 1994 ceasefire probably still happens if Britain is more inclined to the Nationalists but I can see the Unionists being even more intransigent than IOTL which raises the prospects of it collapsing earlier and any eventual deal taking longer to agree.
The minimum wage and Scottish Devolution happen a few years earlier, given how close the 1997 Welsh referendum was I wouldn't offer odds on how an earlier one might have gone. As for the Tories, Heseltine is still loathed by the rank and file so in an interesting reversal of fate it could well be John Major who succeeds Thatcher. It obviously depends on how big the loss in 1992 is and how the Kinnock government performs but with Thatcher's spell broken, and the blame for any Black Wednesday elsewhere, the Party may not be the undisciplined rabble it was for the 1990's and it probably won't lurch to the Right as much as develop the extreme Europhobia it has. There also probably won't be the same deluge of Tory sleaze stories as the media won't be as focused on the Tories. Winning in 1996/97 may be too much of an ask but at the subsequent election I think they'll have a big chance.