They’ll choose Trumpism. Starmer inherited the legacy of the Brexit referendum, and if he’s seen as veering towards the European approach, the oligarch-owned press will have his guts for garters and Nigel Farage in No. 10. As such, he’ll have no choice but to make a speech acknowledging this and rejecting the European approach in principle.
No, Germany has a coalition between the Social Democrats (i.e. Labour/Dems) and Greens, which is in minority as the Free Democrats (i.e. Ayn Rand fans) dropped out because everyone else was sick of their bullshit.
If AfD were in power, Germany would be providing arms to Russia to help it stabilise its region. A lot of things will happen before that does, up to and including a CDU/SDP left-right grand coalition.