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Civil Aviation Bill

I am interested to hear what my hon. Friend is saying, but has not the point been made by Opposition Members that the frequency of aircraft movements is much more important? According to the way in which these things are calculated for regulation purposes, one very loud noise is the equivalent of several much smaller noises. Luton airport is three or four miles from where I live, but I can still hear flights taking off at night on rare occasions, even though they are not very loud. The frequency is much more important than the volume. Surely the Government should be more concerned about the number of flights than about the volume, as Opposition Members have pointed out.