In the last month, I've had 2 learner driver pupil's who possessed foreign driving licenses and have booked tests without first consulting an instructor to find out if they are actually ready for the UK driving test. One of them has been to a DSA centre taken and failed the practical car assessment for a full British permit.
Because you've passed a driving test in another country and possess an international driving licence doesn't mean you can or will pass the UK driving test, especially when you don't even know what you will be tested on! The fact that the DVLA requires you to take a test here means that they don't believe you can drive at the standard the DSA will be testing you on, so you can't just exchange it.
foreign license holders podcast advice.
If you as foreign license holder would like some high quality driving lessons in London to help get the full british driving permit on your first attempt, then give me a call on 07956233032, please note I don't have an automatic car.
Take UK driving test in automatic car.
UK Driving School