The absurdity of the use of kph

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  First and foremost I apologise (yet again) for such a long gap in between blog posts. The return of freedom over the past year has kept me away from screens. They say it takes 66 days to develop a new habit. Running is a habit I developed over lockdown, but the return to the office (and I intend to never work from home again) and frequenting the pub has reduced frequency of this.  It is, however, not completely bleak for my physical well-being. Cramming a number of social events in after work has led to me doing a lot more walking around central London. I don’t have an Apple Watch, (other brands of smart watch exist), but my iPhone records my steps and a lot of really interesting data on my walking and running. As would be no surprise, I’ve configured everything in metric units. Thankfully, gone are the days where Apple would dictate to you , based on your location, the units of measurement you use. You have a chose whether to specify distances in miles or kilometres. You al
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Social distancing - easy adoption of the metre

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 Anno Domini MMXX


The year 2020 has been a year like no other. Thanks to the novel coronavirus and the associated illness Covid-19, the world has been turned upside down. Actions which, only a matter of months ago, would have been seen as ludicrous are now routine. The use of masks, the frequent and almost obsessive application of hand sanitiser, and the treatment of other people like disease-carrying rats would have been unthinkable in 2019. 

A tool that governments have employed in response to the spread of the virus is social distancing. Simply put, it is the act of maintaining a safe distance between people to reduce the spread of the virus through aerosols and droplets.  

The government's public health campaign of hands, face, space notes (as below), that you should stay 2 metres from people or 1 metre with extra precautions. I appreciate that there's no conversion to feet and inches, creating a simple, clear message. 


The NHS website  also does not refer to feet and inches in its guidance, referring to 2 metres or 3 steps. 



It is extremely satisfying that for the most part, the UK has gone with the majority of the world in setting out its social distancing rules exclusively in metric units and has communicated them as such, with no conversions to imperial in sight.

In addition to that, and as businesses have reopened, they too have opted for signs showing social distancing rules exclusively in metres. But that is not the case everywhere. 

I have seen some signs which show social distancing rules in both metres and feet although in general, metric units are given priority.

The issue with mixing units of measurement is that it introduces inaccuracy.  The sign photographed below says 2 metres or 6 feet - but 2 metres is not 6 feet, but rather 6 feet 6 inches. 1.8 metres is 6 feet. Given the official guidance is given solely in metres and that the public have proven that they can understand this, there is little value in adding imperial measures - especially when they are inaccurate. 



The overwhelming majority of guidance and signs about social distancing are in metric units, truly reflecting the fact that we are a metric country. If only we did the same with things that are permanent like speed limits. 




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