How about opening a US bank account for your old UK business?

Edit: oh, I see in one of your comments that you weren't able to do that because your old UK business wasn't registered.

OK, so as I understand it, Apple owes money to a UK business (that in turn belongs to you), but you can't get the money because your UK business has no bank account and isn't registered.

I wonder if Apple can legally take money that it owes to your UK business and give it to a different business (your US business), even if it wanted to?

I think you need to talk to a lawyer in corporate law, and find out how you get money from your UK business that you have no bank account for and haven't registered.