The position is unchanged. What additional provocation has been made?
The provocation is that it will and has changed.
In all likelihood the consent is now given to Kyiv to use long range weapons to strike hundreds of miles into Russia.
The Russians know what the ultimate strategy of Kyiv is: to drag NATO forces into a war with Russia which they (Ukraine) know is impossible for them to win.
The western leaders surely know that. They'll know that Ukraine will eventually target Russian towns and cities with long range missiles and that will force Russia into acting.
IMO the short term response from Russia won't just be militarily: the cutting of sub-sea communication cables to disrupt civilian life here has been mentioned, but more likely the unleashing of terrorist cells in western European nations to bomb major cities. Let's put it this way: if / when the Ukrainians start hitting Russian towns and cities with long range missiles, I wouldn't be making too many journeys into the centre of major cities in the UK after that happens.
Starmer is at the centre of this push, and he'll have unleashed the dogs of war upon UK citizens. The biggest task of any government is to keep its own citizens safe. He's possibly just put that in jeopardy by persuading the US to allow the Kyiv regime to hit Russian towns and cities.