Top Tips to Pass Your Theory and Practical Test   To give yourself the best chance of passing:
  1. Always look for learning opportunities. As a passenger put yourself, figuratively at least, in the driving seat. At junctions or roundabouts run through your mirror, signal manoeuvre steps just as you would do during a driving test. The more you do this, the more it will become second nature to you. During the test itself, you ideally want this to be second nature.
  2. ‘Show me, Tell me’ questions. Designed to test your practical knowledge, you may be asked anything from how to check if your break lights are working through to making sure your head restraint provides the best protection in the event of a crash. Read up on these scenarios and have an answer prepared for each.
  3. Driving test routes. As the DVSA (Driver and Vehicle Standards Agency) don’t publish driving test routes it always makes sense to have an understanding on what areas and roads you may be expected to navigate during your test. You can expect large and complicated roundabouts, junctions or crossroads to always be included and these can be identified by Google Maps. Don't try to learn the test routes, just be familiar with every type of road in the area.
  4. Practice, practice and practice some more. Practising your manoeuvres as often as you can will help you feel more comfortable when performing them in the test – especially if you are able to do these in the car which you will take your test in.
  5. Revisit your theory. Knowing your signs and your highway code when on your test will greatly settle your nerves and boost your confidence – allowing you to drive in a relaxed and safe way. And, your examiner will notice.
  6. Mock test. There are a number of online resources available enabling you to get plenty of practice in before the official test day. Practice tests posted by the DVSA have 50 questions whereas the live test will see you faced with 100.
  7. Stay calm and don’t panic. It’s only natural to feel overwhelmed – particularly if you make a mistake, if you are not sure how to proceed, or if your mind goes blank at a crucial juncture.
  8. Eat before your test. You need fuel as much as your car. By ensuring you are hydrated and nourished will, in turn, help to energise you, ensuring optimal levels of concentration and performance.
  9. You are not the Examiner! Whatever you may think about your performance on the day, you must remember that the examiner owns the final opinion. This works both ways; you could feel you have failed following a mishap or lapse in concentration. Remember though, if you have addressed the issue correctly and done all you can to maintain the safety of yourself and other road users, the examiner may think that you have done everything properly, and therefore won’t fail you. Stay calm and be confident. This does not mean you can’t drive well. What you do next however will be a testament to your driving skill. Remain calm, assess the situation and take the appropriate action to remedy it. This is noted by your examiner and correctly & calmly addressing any issues is a bonus.
Source - https://www.lookers.co.uk/blog/how-to-pass-your-driving-test-first-time-10-tips-from-lookers