I believe there is an online tool which shows which businesses are authorized. You can find a website that has a list of authorized dealers on it that conduct the MOT test.
A great way to see which businesses are authorized to give your car an MOT test is to check the world wide web. The world wide web contains in it search engines that can be used to search for relevant content.
the best way is to call them and see and usually if they are not certified in that make they are probably not authorized either they train people to work on certain cars
Business that come within Department of Transport can give you the MOT test. There needs to be a three triangular blue colored logo on the businesses to issue test certification.