The minimum age for taking driving lessons in a car in the UK is 17.
Before you can start taking driving lessons you must apply for a provisional licence, which you can do 2 months before your 17th birthday, however you can NOT drive until your 17th birthday.

To apply for your provisional licence, and obtain further details, visit the DVLA website at www.dvla.gov.uk or obtain a ‘D1 Form’ from your local Post Office.