If that's a Rydales price then they have almost certainly added an annual service to that figure. IIRC my 18k service, last year, was about £190 inc VAT
My 24k (major) service at Rydales was under £250 inc VAT in July.
I never bother with the annual services - changing brake fluid every year is a bit OTT IMHO. The rest of the stuff is either included in a major service or stuff you can easily do yourself.