Hello,
Thanks to all the riders who stopped to offer help, tools and sympathy after my chain tensioner broke on the Ginge track. In the end I walked the rest of the way to Harwell Campus. I found some spare parts at home for a temporary fix and rode home tonight (slowly!). I will be treating the bike to some new drivetrain parts! I only cleaned and serviced it a week ago. Maybe it was the mud and crud that was holding it together…