Take a look at http://www.transtat.dft.gov.uk/tables/tsgb02/index.htm
especially Section 3, for an illustration of the confusing mess we've got ourselves in to! Chris -- UK Metric Association: http://www.metric.org.uk/
Take a look at http://www.transtat.dft.gov.uk/tables/tsgb02/index.htm
especially Section 3, for an illustration of the confusing mess we've got ourselves in to! Chris -- UK Metric Association: http://www.metric.org.uk/