Ian - are your LU figures the total for the year in question, or the maximum in any one night? I only ask, because in 2006 (hot summer) I had 3 consecutive nights 24/5/6 Sept., when I trapped over 200 each night, the 24th & 26th just over 270. The following year 2007 (wet summer) the most I caught in one night was 23. Similarly the wet summer of 2012 caused the numbers to plummet again (single figures on any one night) from reasonable numbers in 2011 (itself nothing like as good as 2006). I believe the cause may be that they pupate underground, and the pupae simply rot in the wet soil. Hopefully this year should see the numbers climb again - we'll see !! (These records above are from when I was living in Lydford - Pylle may well be very different).