I would not get excited about this reset. My prediction is that the EU's public positions will be so unpalatable that Starmer will do very little in the next few months.
All eyes on Trump, who looks to be carving us out of his tariff wars and pushing hard for the trade deal Biden suspended to be revived.
This is an interesting moment because on the matter of regulation and alignment; where the UK is still very close to the EU, if there was a deal with the US, that would have implications on whether we could align with the EU or obtain a better deal on goods and SPS. My working assumption is it would become very difficult for the EU and the UK if we had.
Also no way should the UK enter an EU defence arrangement without a serious uptick in spending from EU countries on defence as a precondition. Predict no agreement there. NATO can cover that fine.