Writing for the Telegraph, Professors Carl Heneghan and Tom Jefferson, from the University of Oxford, said there is little evidence to support the restriction and called for an end to the “formalised rules”. The University of Dundee also said there was no indication that distancing at two metres is safer than one metre.  https://www.telegraph.co.uk/news/2020/06/15/two-metre-rule-has-no-basis-say-oxford-university-experts/