Anyone holding British nationality and another nationality must ensure that the name on their non-British passport matches the name on their British passport. In particular, the UK Passport Office will not issue a British passport in one surname where the foreign passport is in a different surname.
This can affect women in particular. If someone holds their foreign passport in their maiden name but has since married and is known in the UK by their married name, it is no longer possible for them to apply for a British passport in their married name and submit the marriage certificate as evidence of the change of name. Instead, they must change the name on their foreign passport before applying for the British passport in their married name.
This rule applies even if the person already holds a British passport in their married name and they are applying for a renewal of their British passport.
We recommend that dual nationals check whether they may be impacted by this change and take action as soon as possible as some countries can take several months to issue new passports.