OK, just to update this for future reference:
Bike is garaged, no alarm, no mention of locks in case they stick a clause is saying they will lower the payout if it's not used, 9000m per year, Business use included, £4500 value

; CIA renewal came in at £231 TPFT (RSun Alliance) or £561 FC (NU).
Hastings Direct came in at £321 FC (£350 XS) & £220 TPFT (£350 XS).
Advantage (that's Hastings underwriter) also came in on other people's list (Motorcycle Direct, Bennetts, Insure) and GroupArmour (Carole Nash, Devitt). Premiums varied between £339 to £357 for Advantage (and XS from £325 to £400) and with GrpArmour from £333 to £388 (again with variations on XS).
Interestingly all gave TPFT with the same underwriter KGM, mostly close around £180 but 1 down at £140. Only Insure (the lowest of these quotes) actually told me that the policy would also cover up to 4 bikes. Nice to know.
Strangely there seemed to be no correlation between premium and excess sizes, i.e cheapest premium was not necessarily the highest XS.
As one last shot I tried Elite, nice big ads in Bike and the comic

(I had to have something to read in the puc one night!) online and they turned up £298 FC, but being silly o'clock I couldn't be pestered to fill in the buy-it details. Oh also with Advantage at £350 XS and TPFT with KGM again but an amazingly low £133!
Next day I get an email - "We think we can get you additional discounts....Please call....". One can but try, though I was sceptical. Ran through all the details again just to make sure and....£262 FC, only £175 XS with .... Norwich Union! The same people who CIA quoted me £561 to renew with them and someone else quoted £516!
So how come I get FC insurance for just over my F&T renewal?; how come I get an XS half what anyone else was quoting? How come there is so much variation even on XS from the same underwriter through different brokers?
I was so unsure I made sure they had the details right and checked the provision of the policy - pillions? check; other bikes? check; business use? check; legal cover? check; courtesy bike if it's sole transport, he added trying to sell it to me....
I'll tell you what, a shark couldn't have taken his arm off any better. Hope I don't have to test the service level, but if you need a quote give 'em a try
http://www.aquote.co.uk