Not really... but in theory would it be possible to set up a 'bank' abroad and email a UK bank to increase the amount in an account?
After all, no money changes hands; one balance figure decreases and the other figure would increase? How do they certify that an amount they are accepting actually exists?
Well ummm yes in theory. You'd have to comply with the banking laws of the country you set up in and join the international clearing scheme.
But money does change hands - one bank pays it to the other. OK they will net it out but any discrepancy at the end of the day does actually change hands.
And I can't see any bank anywhere in the world moving money anywhere on the say so of an e-mail.