Funnily enough thats exactly what i have just done brought mine down and my misses down by over £400 in total.
So i am now £650 with protected no claims, extra personal cover, £250 excess. which i think is bloody impressive considering im only 25, and I have my missed who is 24 on the car aswell.
They brought her insurance down from £700+ with £800 excess to £400, £500 excess on her Mini Cooper s with me on it aswell.
Really chuffed. (with out protection mine would be sub £600 i am paying around £90 to protect but kind of figurered at my age its worth doing)
In my experience (and I'm an old fart too) - protecting your no claims is a con - I had a bump a fair few years back, no claims was protected but my premium went through the roof - go figure