Woke up to a flat rear, took it to the local tyre place and a nail had gone through the tyre at an angle and very slightly scored the inside of the tyre wall. Wouldn't let me leave with a dangerous tyre so new one fitted. Gutted as the tyre was max 2000 mile old and the inside score was so small you could hardly feel it 

Should get a a rest of the winter ever comes. :wink: