Marriage Allowance.

[Sipowicz]

Just a reminder in case any who's eligible hasn't yet applied.
https://www.gov.uk/marriage-allowance

[New Judge]

But before you apply bear in mind that this not an "allowance" as such (though the government would like you to think that it is, hence the title on their webpage). It is simply the facility for one (lower paid) partner to transfer a small part of his/her personal income tax allowance to the other partner.