Most other companies i have tried quoted very high for my 4 bikes. I paid under 300 pounds this year by limiting mileage to about 3000. That cover is for R111,1700 Thunderbird LT, T120r, BSA Spitfire valued at 30,000 pounds comprehensive with full breakdown and riding other bikes. The other bikes cover is very rare with the other insurers.
Bikesure,Peter James,Benetts were very high and preferred to insure the large bikes on a separate policy which almost doubled my single policy with CN. My first choice to go for a quote would be CN, Peter James , then Hastings. One of them will win by a mile. Just check it includes breakdown and recovery as many companies have it as an extra and will charge for it on top of the policy.
Let us know who wins.