National Savings and INVESTMENTS

Hi all. I have a NS&I Account in the uk. Not a lot in it but it would be handy for when we go to the UK in July.

Just found out that you can no longer write, request a withdrawal and receive the cash at a post office.

It now has to be by bank transfer to a uk account in my name - I dont have one, or by a thing called a warrant.

What is a warrant and do French banks accept them to pay money into my French account?

Is there any other way to get my money out of the NSI investment account?