On 4 April 2023, London City Airport scrapped the 100 ml liquid rule. 1 Since 2006, airports worldwide have insisted that travellers can only bring liquids in containers of up to 100 ml in their carry-on bag. 2 These days, we take it for granted that the 100 ml limit for liquids at international airports around the world is exactly the same quantity. This is a triumph for the metric system, which replaced many different national systems long ago. Before the metric system, the same unit names were used for different quantities in different national measurement systems and there was no common definition for these units. The worldwide 100 ml liquid rule shows the benefits of a world standard measurement system for international travellers (i.e., the metric system).
Continue reading “London City Airport recently scrapped 100 ml liquid rule, which still applies in airports worldwide.”Recent YouGov survey on attitudes to metrication of road transport
On 4 April 2023, YouGov carried out a survey of 4808 British adults about changing the rules around speed and distance in the UK from miles to kilometres. It revealed insights on different attributes based on region, politics, and age.
Continue reading “Recent YouGov survey on attitudes to metrication of road transport”Why the Metric Martyrs were wrong
Over twenty years ago, a group of market traders were prosecuted for using imperial measures (without showing the equivalent in metric units) and using unauthorised scales that could only measure in imperial units. Newspapers called this group the Metric Martyrs after Chris Howell, then weights and measures spokesman for the Institute of Trading Standards Administration (today the Trading Standards Institute), said that they could martyr themselves if they wanted to. As Ministers are thinking about allowing traders to choose imperial or metric units, we look at what is wrong with the Metric Martyrs’ arguments for freedom of choice in measurement usage.
Continue reading “Why the Metric Martyrs were wrong”City of London’s 15 mph plan was another missed opportunity to introduce km/h
Between 2019 and 2022, the City of London planned to become the first UK region with a 15-mph speed limit. This plan was blocked by the Department for Transport because speedometers are not accurate enough for low speeds. It meant that it was not technically possible. Like the mass rollout of the 20-mph speed limit, the plan for a 15-mph speed limit across the City of London was another missed opportunity to introduce km/h speed limits.
Continue reading “City of London’s 15 mph plan was another missed opportunity to introduce km/h”Proposed congestion charging per mile
The London Assembly Transport Committee recently held a Road User Charging public consultation between 9 February 2023 and 10 March 2023. Under these plans, drivers in London could be charged for every mile they drive. This anti-pollution measure is mile-based whereas emissions levels are kilometre-based.
Continue reading “Proposed congestion charging per mile”Should the NHS do more to encourage patients to use metric?
Sometimes, the NHS needs to measure patients’ weight and height. The NHS records their weight and height internally in metric units but often tells the patients their weight and height in imperial units, which is preferred by the vast majority of Britons. This requires conversions. During the pandemic, the Government used metres exclusively for social distancing information. We use grams and kilograms for recipes, food purchases and the gym. We are all familiar with these units. So why does the NHS convert from metres to feet and inches and from kilograms to stones and pounds for its patients?
Continue reading “Should the NHS do more to encourage patients to use metric?”Major commercial broadcasters use cm only for snowfall
A few days ago, weather forecasters were warning the public about a period of freezing weather and snow. Major British commercial broadcasters’ websites have expressed the levels of snowfall exclusively in centimetres. There has been no use of inches for snowfall in their online weather reports.
Continue reading “Major commercial broadcasters use cm only for snowfall”Odd British Measurement Usage in the Transport Sector
Some aspects of measurement usage in the British transport sector appear to be uniquely British with no known parallel across the whole world. The British really are out of step with the modern world when it comes to transport measurements. The British transport sector is one of the last imperial bastions in the UK thanks to DfT policies.
Continue reading “Odd British Measurement Usage in the Transport Sector”British contributions to the metric system
The development of the metric system was a truly international effort. The British have made substantial contributions to its development. The metric is in effect an English invention. Metrication was first proposed by an Englishman, the Reverend John Wilkins in 1668. British scientists have been at the forefront of developing the metric system, and many have given their names to metric units, including Newton, Faraday, Joule, Kelvin and Watt.
Continue reading “British contributions to the metric system”UKWF issues warning about risks of REUL Bill
Yesterday, the UK Weighing Federation (UKWF) issued a briefing on the regulation of the UK weighing industry and the Retained EU Law Bill. This briefing emphasised the key role of weights and measures in all areas of industry and consumers’ everyday lives and also explained the serious consequences of lowering or complete removal of current regulatory standards.
Continue reading “UKWF issues warning about risks of REUL Bill”
Metric Views 