You can find out where to apply for a passport at an overseas UK embassy by checking the list of these on the Foreign and Commonwealth Office website (new window).
Alternatively, you may apply in person for a passport whilst visiting the UK. In order to do this, you need to make an appointment at a passport office and you must provide an address in the UK to which the passport may be posted. Please note that we do not accept applications by post or e-mail if you live abroad.
Further reference:
24-hour Passport Adviceline: 0300 222 0000 (see terms and conditions). Calls made to 0300 numbers from landlines and mobile phones are charged to customers at their network provider's national rate. Live operators are available to assist with your enquiry 24 hours a day.