I found adding my older brother as a driver on the policy who has been driving 20 years with no claims helped bring mind down alot.
Insurance companies can pull some weird tricks with this, I had my partner added to my insurance when she was learning to drive, when I came to take her name off they quoted me a higher price, so I left her on, as a learner.
MAKE SURE that if you add anybody else to your policy YOU are still listed as the main driver, putting mum/dad as the main and you as a named may make the policy cheaper, but it's called "fronting", it's illegal, your insurance will be voided and your car can be seized, however, having somebody much older as a named driver on your policy can bring it down, a lot, and as the policy is for you as the MAIN driver with them having the ability to be insured on it should they need to use it, it's perfectly legal.