Im paying £120 a year with Carole Nash to insure both my R1 & my 996 on a multibike policy. I was paying just £60 a year just for the R1 previously at another company, so it doubled when I wanted to add the 996.
I'm with Hastings Direct, can't remember the premium but around £140 with a fair few extras like replacement gear, legal etc. I was with Bennetts but they refused to offer to re-insure me after a lorry had reversed into my Mutley during my previous insurance term. I was stationary, had witnesses, the other party admitted full liability and Bennetts agreed I was completely blameless, the underwriter refused me. Personally I think it's because both I and the lorry driver had the same underwriter - AXA. Another thing about Hastings Direct is that I can add the Nelli Tornado to my current policy to make it multi-bike for £79, but £25 of that is a one off admin (i.e. because we can) fee.