don't know i'm afraid as knew how to do it from when I used to be a dog beautitian many moons ago, would be worth having a ring round local vets and ask them to quote for it as I find my 3 local vets all vary on their prices for different things (I always do a ring round for non urgent routine stuff like rearguard etc, £10 difference on rear guard and a good £6 on vacs! so definately worth getting quotes)....would have thought about £7? but that's a guess.
I used to charge £2.50 for the dogs for a walk-in manicure or free with their hair cut...but that was 19 years ago (blimey now I feel very old!)