If you are booking a driving test it is very important you seek the advice of your driving instructor if you have one for the following reasons.
1. They know the nearest test centres to you, how long it takes to get there and what the traffic conditions are at various times, all of which matter and can have an effect on whether you pass the driving test or not.
2. If you have been taking driving lessons your instructor knows your strengths and weaknesses and can tell if you have a higher probability of passing at which centre.
3. Your instructor will have knowledge of the dsa examiners and can pre warn you of how they deal with candidates, such as those that have a strong face, don't smile or even chat during the test.
4. If you choose to book a test at a centre because you get an earlier date, and you instructor is not very familiar with the area, then he/she might not be able to help you practice on known tricky areas like roundabouts or junction, narrow/busy roads.
Important! If you are not learning to drive with an instructor, it is important that BOTH you and the person teaching you to drive read The DSA official test guide, this book will greatly increase your chance of passing the driving test without spending too much money on lessons.