If you are overseas, report the incident to the local police as soon as possible and obtain a police report in the cases of stolen passports.

Following this immediately inform the nearest British Consulate, this will reduce the risk of someone stealing your identity or attempting to enter the UK on your passport. Send or take a copy of the police report along with a completed LS01 form to the Consulate who will then be able to cancel your passport.

If you are in the UK, contact the Identity and Passport Service (IPS) on their Passport Advice Line 0870 521 0410 for guidance.