There’s probably not much sugar-coating to be done here, I’m afraid.

This requires probably the largest crystal ball ever - it’s a hugely complex itinerary and I’d be astonished if it all worked out. If someone here tells you they can tell you with even the tiniest bit of confidence what will occur then, frankly, they’re being very economical with the truth!

If I can give you a single piece of advice, particularly with that many countries on your list, it’d be to avoid the UK. The chance of all of them being on the green list, and therefore quarantine not being required in some form, is remote.