Hi SpringBok, Thanks I found one problem{8,27}, I had a row duplicated in the text file. {27,32} is also spot on. Please check your results for {8,32} as the skip high I have is 17 not 16 occurred 16-25 April 2007. Otherwise the program seems to behaving itself.
Pairs of interest for lunchtime {32-41},{37,47},{41,43} and {41,47}.
Regards
Patrick