A decision is due to be made later on plans to introduce 20mph speed limits in parts of Brighton.
The lower limit has been imposed on 500 streets in the city. Similiar schemes have been introduced in other towns and cities - but not on this scale.
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The Orkney Islands took second place, followed by Rutland and Wychavon while last year's winner Winchester falls to fifth place.
With more people in the UK living in temporary accommodation, parts of England will soon trial a scheme which has tackled the problem.
Forecast for tonight and tomorrow in the west