Flouridation has saved whole generations of people in my city from the pain of tooth decay suffered by their parents and grandparents.
And Ivor you have to do better than wikipedia to support your stance:
The neutrality of this article is disputed.
We were unable to discover any reliable good-quality evidence in the fluoridation literature world-wide.
What evidence we found suggested that water fluoridation was likely to have a beneficial effect, but that the range could be anywhere from a substantial benefit to a slight disbenefit to children's teeth.
This beneficial effect comes at the expense of an increase in the prevalence of fluorosis (mottled teeth). The quality of this evidence was poor.
An association with water fluoride and other adverse effects such as cancer, bone fracture and Down's syndrome was not found. However, we felt that not enough was known because the quality of the evidence was poor.
The evidence about reducing inequalities in dental health was of poor quality, contradictory and unreliable.
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4841a1.htm#fig1Tooth decay goes down as soon as it is introduced into the water supply.
Welcome to the finer details behind "more research is needed".

Of course, by the same measure, we don't really know that smoking causes lung cancer. Damn government interference!
However, we should leave well enough alone. The Brits are known for having excellent teeth, after all.
Linda
20 years? Push your timescale out a lot further because we have had fluoridated water a lot longer here without negative consequences. Water is also chlorinated. Do you want to stop this as well?