Re: So funny :-)
Strangely enough I just paid £263 for my insurance elsewhere when Tesco decided my renewal would be £530 instead of £370 due to an address change (to a 'nicer' area, too). Got the price from the opera-singing-now-robot company.
Which I consider pretty reasonable for fully comp with PNCD and legal for an XKR (hence why I don't want an acceleration/braking/cornering e-nanny).
When an insurance co puts their prices to silly levels I just assume it's cos they no longer want to cover your demographic any more, having focussed on a more 'profitable' one for that year. It all seems like a mahoosive scam anyway, imho, I'm sure these buggers all cahoot and collude together.