Was last year's long, hot summer the pattern for summers to come, as some weather prophets predict? If so, Pat Lucas will be very much in demand. She is a professional finder of water - the good old-fashioned water-diviner; but there is nothing old-fashioned about Pat Lucas herself. She feels just the same obligation to her clients as an architect or doctor might do - and she still uses the traditional hazel twig for her dowsing. Today's programme accompanies Pat Lucas on one of her professional engagements to see how, even in times of drought, an expert can still find water,; Producer DILYS BREESE BBC Bristol