The winter in Britain this year has been exceptional, one of the worst in recent memory. This week we’ve seen farmers desperately trying to rescue their sheep and cattle, buried deep in snow drifting over the hedges where they sought shelter. Where the sun breaks through there is a slow thaw, but in the hedgerows it hangs on. The nights have been crystal clear and bitter cold with bright moonlight. The clocks change to British Summer Time tonight but the summer seems a very long way off. Last night, the moon called me at 3 o’clock and as always, lured…