Hello David, I'm Keith and happy to help you with your question.
Normally no, spouses have been separate for tax purposes for many years now. However, there may be a loophole, if either of you were born before 6 April 1935. If this is not the case then, regrettably, no loophole exists.
I thought that unused allowances from one spouse could be transferred.
It effectively can, but only if one or other is old enough and it actually not a transfer, but another allowance, Married Person's.