(076) What A Tube

I finally got round to investigating the cause of the latest puncture (back tyre, of course) and discovered the tube was worn through by the tyre liner that I fitted...in order to reduce the chance of a puncture! Despite taking care to round off and smooth the ends of the liner there was, evidently, enough of an edge to wear through the tube so the liner has been removed and I'll take my chances again without it.