Actually there is no proper scientific evidence that they have. Go and ask the council for the exact pre-20mph zone data on accidents, injuries and deaths attributed to speed - they can't give it. Likewise they refuse to give the current data since the introduction of the zones. All you've seen...
Not true. Mike Weatherley strongly opposed the plan and I have correspondance between myself and him and him and Grove to back that up.
The people that nearly sold us down the river on that one were the local Greens who actually suggested the site ( amoungst others ) to the government...