Question: when did water fluoridation begin in the uk
Answer: Earlier plans were undertaken in the Health Authority areas of Bedfordshire , Hertfordshire , Birmingham , Black Country , Cheshire , Merseyside , County Durham , Tees Valley , Cumbria , Lancashire , North , East Yorkshire , Northern Lincolnshire , Northumberland , Tyne and Wear , Shropshire , Staffordshire , Trent and West Midlands South whereby fluoridation was introduced progressively in the years between 1964 and 1988 .