Many thanks for your replies. That is a huge relief. Otherwise i'd have to drag the original zorts right from east London to Middlesex on the train to get them swapped. I love my CCC's, so want to keep them on and let them continue to save my life and the lives of dopey pedestrians in central London.
My neighbours probably don't share my enthusiasm as i set off all the car alarms on the street in the morning. Ho hum.

Thanks again, my mind is at rest again.

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only dead fish go with the flow..................