No. International driving permits are not required in the UK. You will need a valid, recognised driving licence and photographic ID. These licences are valid in the UK for up to 12 months. International permits can be useful if your current driving licence is not printed in English, but they are not a requirement.
Licences issued in the European Union (EU) or European Economic Community (EEC), are valid for driving in the UK until they expire. You will not be required to exchange it unless you become a permanent UK resident. You will be allowed to exchange this licence without retaking your driving test unless you obtained your EU licence by exchanging a non-EU licence.
Licences issued by Gibraltar, Jersey, Guernsey, Isle of Man or a ‘designated country’ (Australia, Barbados, British Virgin Islands, Canada, Falkland Islands, Faroe Islands, Hong Kong, Japan, Monaco, New Zealand, Republic of Korea, Singapore, South Africa, Switzerland and Zimbabwe) are valid for driving in the UK for up to 12 months.