After some 10 years with Bikesure multi-bike they appear, at least for me, to have become progressively less competitive, to the point now that it's a case of that's the price, take it or go forth, so no longer interested in competing with the market. Some say it's the £20k plus headline cost of many premium bikes (K1600GT-719); others suggest it's the way blocks of risk are traded.
Whatever,
https://www.mcncompare.com/ produced a far better deal, with the same underwriter, exceeding the usual comparison sites (TV ad costs?).
One little wrinkle to learn though - if you switch mid-term, the bolt on goodies like legal, PA or clothing & helmet cover may well die with the policy cancellation. In my case they could not continue as a stand alone & were non-refundable. OK It's there in the small print, but I still felt cheated at the time. Sometimes these products get offered as a free or low cost extra when we renew, only to become a permanency as the insurance rolls forward each year. Those of us who take a pillion regularly also need to be aware that bolt on extras often exclude risks to the passenger.