Sealants
Tyreman - thanks for your advice. It seems such a shame to dispose of a nearly new tyre that I have just 'scrubbed in'. I am going to get it repaired as it should be fine for normal road use - after all I can hit 50mph on my bicycle with tryes weighing only a few ounces. On the issue of sealants - I would rather have these in my tyre as well as a nail than just to have the nail. I check my tyres regularly for cuts and nails so I wouldn't expect this to be a major problem.