still no progress on the tube this morning. I left it clamped in a vice overnight, and while all seemed well and good inspecting it this morning, it developed a leak again at around 20psi. It seems the air always finds some tiny weak spot to enlarge and seep around the patch :S Is anyone else having problems with halfords' tubes? I'm half tempted to take it back and complain as if a tube can't be patched properly it's not fit for purpose as far as I'm concerned.