When you start to Practice for a Living, Insurance is not compulsory, and have done  (as of 9/7/24) But if you are Taken to Court, the costs could be excessive.
I use Westward Insurance and have done for many years. I can thoroughly recommend them, and if you click the link on the picture to the right it will take you to their site and if you use them you will receive a £10 discount. Go on, "Give it a Go".