Always check the specific up to date travel advice for the country you are visiting on the GOV.UK website.
Also, look at your passport to check 2 dates:
How long you have left on your passport?
What is the date of issue of your passport?
If it’s due to expire you may be refused entry. Some current examples:
Australia, Canada and the USA just need your passport to be valid for the length of your stay,
China, Thailand, Egypt and Turkey need at least six months.
For the EU:
The passport issue date must be less than 10 years before day of arrival in the EU
The passport expiry date must be at least three months after intended day of departure from EU
In general, many countries that require a visa to enter will require at least six months validity on your passport when entering the country.
Overseas British passport applications
To get the forms, prices and application details you need if you’re a British national and you want to renew or apply for a British passport from overseas, go to: