I'm in the UK too, finding myself unwilling to pay the new Mac prices and getting impatient for the framework. So, recently I've been considering a StarBook Mk V from https://starlabs.systems/

They publish a full disassembly guide[0], so I'm reasonably sure the whole thing is repairable and upgradable if necessary. Lots of options for custom build at order time including coreboot. I'm a bit hesitant about a 1920x1080 display but otherwise extremely tempted.

[0] https://support.starlabs.systems/kb/guides/starbook-mk-v-com...

Perhaps you can consider this one instead: https://puri.sm/products/librem-14.