Sir: The Trent has a much wider value to wildlife and local communities than simply as a match-fishing venue ("Trent is too clean for its fish", 4 May). By the end of the century Severn Trent Water will have spent some pounds 400m over 15 years improving the river. While some species may find the natural quality of the river less to their liking, a wider range of insects, animals, fish and birds can find homes in and along the river. A cleaner Trent also allows us to develop water supplies sustainably.
Dr BOB BREACH
Head of Quality and Environment Services
Severn Trent Water