just as a word of warning...
if you have an insurance policy where your dad is listed as the main driver. and you're just listed as a secondary (named) driver.
but in fact you are the main driver, (e.g. you have more use of the car than your dad).
then the technical term for this is fronting.
it's illegal, it's insurance fraud, it could mean that in the event of an accident your insurance won't pay out, if the insurance company suspects this they'll cancel your policy, and you'll all loose your no claims bonus.
(and you'll have to pay for the claim that the other party might be making against you out of your own pocket, when they 3rd party takes you to court to claim for their damages.
and when you try to buy insurance in the future when they ask if you've ever been refused insurance, or had a policy cancelled in the past you'll have to say yes, and have more expensive policies, for the rest of your life!
probably end up with a conviction for fraud with that too... and then also a conviction for driving without insurance.
bad news,
just get your own license and take the hit on the insurance, it's only for a year!
the first year I started driving my insurance was £1500 a year I paid it in instalments, the next year it went down to £800 then £500.
(actually it might have been more than that, I remember having to pay a huge deposit and then £160 a month instalments).