I couldn't find a policyto do both cars and bikes.
 I was with -err, someone whose name escapes me but are now part of Motorcycle direct. They do a multibike policy (up to 4 bikes). Might be excel... 
 Anyway, you tell them the main bike and approx mileage for each, and they load each bike accordingly.
 I had a blade, a vfr and a 996 all insured fully comp for less than 800 quid 
 
  As for cars, I have what is called a 'portfolio' policy underwitten by bank of scotland, that does cars, house buildings & contents, and travel, all in one lot. You can have as many cars as you like as long as each is individually worth less than a certain figure (40k in my case). All are covered for class 1 business, and they don't care about mods. 
 
  If you want to know more about this send me a U2U, but I know that some people I have given their details to last year said they weren't taking any new business 

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 Cheers,
 John.