Buddy, that worked a treat. Thank you! We can now let both President Biden and Prime Minister Starmer know that the “special relationship” is alive and well - cruciverbally anyway 😉!
Finished, thanks to a few clues from here. Clashes cleverly constructed, but slightly disappointed that resolutions didn’t lead to real words. All solutions fitted their themes except the third music one. How does all or part of that word relate to music?
The music reference is in the clue (Cabaret). There were several others where the answer was a normal word but the clue contained a relevant reference (e.g. the final Sports and History clues).