This is why there is even a "market" for getting "better quotes" between insurers. This is why outsurance can do their R400 thing,because the chances are 90% you will be at Insurer X, for at least a year, so you WILL get a better quote from any other insurer because they will use the latest value. It's pretty crappy market imho.
The only regulation they need to add is , is that insurers pay out what you insure your car for, regardless of what the depreciated value is. If they don't revise your insurance, they should pay out. This will automatically "encourage" them to revise these things.
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