pfffft

8:30pm and doing a quick fix to the rear tyre. Again.

I changed the back tyre last on Sunday as it was deflated when I went to check the bike over for Monday's commute. The tube seemed fine, no evidence of a problem. Re-fitted and re-inflated, all was well.

Then on Monday morning, all togged up and ready, the tube was flat again. My resilience was lacking due to lack of sleep, so off to work on the train.

But that was Monday.

I'm now replacing the tube and adding this one to the pile *to be investigated*.