I believe in it to an extent (I live nowadays in the Swedish Arctic so I know me 'nanas when it comes to winter darkness and summer sunlit nights!!!) but I wouldnät have expected any really noticeable increase in seasonal behaviour change in the UK until the clocks change in October..........or......? Would be interesting to see Tom's slant on it. By the way Tom - been reading your blog for a while now - excellent stuff and it's changed so much over even just a year. Plus it helps me remember I'm English when surrounded by these weird-talking Swedes!!