Yes, I know, I'm still trying to have the last word but I just saw the next letter to the one I posted, so let's kill the thread on a lighter note:
"This mildly boisterous pastime has now gone underground. Small groups of chairs are beginning to appear in public spaces. Short bursts of music can be heard and groups of individuals,pretending to be otherwise occupied, can be seen jostling for seats. Police are aware of this new development but say they are sitting on it." Linda Swann, London.
Sorry for typos in last posting.
RtS