I keep mine in a locked garage, don't know what it does for the premiums but I've been in touch with YellowJersey and they say that the insurer will consent as long as I use a floor or wall mounted anchor, a gold rated D shackle, and a cable lock through the wheels.Also the lock on the door must be a close shackle padlock, which means fitting a hasp for the padlock. All this comes to about £100 plus the £85 premium, so I'm looking at nearly £200 to insure a £1000 bike.If it's stored in a locked shed, what does that do to the premiums??