To be honest it will depend on your circumstances, mine worked out about £240pa approx.
I'm 38 with full protected ncb, 3pts, living in Norfolk, a 2 car household, my other half as a named driver, & the car kept on the drive overnight, doing 5k miles a year!
Should your circumstances be the same as mine that's what you'll be paying. It did bring my excess down from £100 to £60.
Also worth noting is that I was part of the way through a policy so they have you over a barrel, when it's due for renewal I'll be able to get a proper idea.
It's insurance group 17E btw!