An old ivy-clad oak tree. Trees, like rocks, have been the big revelation when I moved to England. Somerset is full of wonderful trees of all kinds, each one a world of its own worth recording. Often I spot fabulous trees from the road or even the motorway, and my first reaction is always to block the traffic, get out of the car, take my picture and, with an apology to the drivers queuing behind me, drive on. It is – of course – not possible!