Thanks John, that's really interesting. Filled with fuel just before getting on the ferry and reset the trip. I wonder? Joining the Portofino bash tomorrow, but will check code as soon I get an opportunity. As far as I could tell ( car on jack, no axle stand, bright sunshine and turning hub best I could) the LED was illuminating consistently as the castellated wheel revolved. The speedo is slow across the speed range, nothing much registering below 20, then slowly dragging itself round to 30 on the dial as speed increases through 30 - 80. Defiantly a case of "go slow" not "go then stop" thanks, Roger