For this purpose, 6 feet and 2 meters are the same measure.
It's "about this far apart" and the UK isn't going to advise their population to "stay at least 185cm apart" anymore than the US is going to advise "stay at least 6'6" apart".
Not breathing the same air and not sneezing / coughing / speech spitting on others is what the 6 feet, 2 meters numbers are about.
As usual the best solution is one that avoids the problem. If working remotely is an option, if not even being at risk is an option, just don't place the bet and keep holding that curve down.
If anyone is still thinking in terms of "like returning to normal", at least before there's a wide-spread and effective vaccine, they're already starting from the wrong foundation of thought.
It's "about this far apart" and the UK isn't going to advise their population to "stay at least 185cm apart" anymore than the US is going to advise "stay at least 6'6" apart".