Yippee. At last I have had a puncture. All the years, and thousands of miles I have cycled and not one puncture. Perfect setting for 1st puncture - in garage just about to go out and noticed front tyre was flat. Managed to change tube and put tyre back on. A little bit of glass was the culprit. Now I know I can do it - next time it will probably be out on the road with wet and windy conditions. So happy!!!!