Useful links

UK Metric Association – An independent organisation campaigning for the UK to complete metrication

Metric System – The International System of Units (SI)

Think Metric – A guide to the metric system in everyday use

Government web site – Weights and measures and the use of metric units

SI units – NPL’s guide to the UK’s official measurement system. NPL is the UK’s National Metrology Institute

The Traffic Signs Regulations and General Directions