You can take your driving test in your own car rather than your driving instructor’s. It must meet some basic rules and standards, as well as some things fitted.
Using your own car for your driving test

You can take your driving test in your own car rather than your driving instructor’s. It must meet some basic rules and standards, as well as some things fitted.
Please stay courteous and allow people to do things on the road but beware of flashing and being flashed!
Make sure you understand peoples intentions and that it is safe to proceed. Don't just blindly react and go!
You ‘link’ together what you see and from that you decide what you might reasonably expect to happen next.
Employers have to manage road risk in the same way that they manage other occupational Health and Safety risks throughout the rest of their business operations.