If your planning to drive a car abroad you will need to obtain an International Driving Permit (IDP) for certain countries. This will be required in addition to your U.K driving licence if your thinking of driving or hiring a vehicle.
To appy for an IDP you must meet the following criteria:
An IDP can't be issued if you hold a foreign driving licence unless it's an EU driving licence and you reside in the U.K
An IDP is valid for one year and can be obtained up to 3 months prior to your trip. There are two types of IDP (1949 & 1926). it will depend on which country you are visiting as to which one is required - see below.
Brazil, Moldova, Tajikistan, Turkmenistan or Uzbekistan: contact the embassy or consulate to find out about driving licence requirements.
Bermuda: Visitors aren't allowed to drive.
Ethiopia: The IDP isn't recognised but you can obtain a temporary licence from the local authority when present your U.K licence.
China: You will need to obtain a temporary driving permit when you drive.
If you are still not sure if you need and IDP then check on the RAC website.... follow the link