I just feel that it's now a small group of BJ and DCs favourites, sitting around a table (socially distanced to the best of their ability - do they know what 2m is?) deciding what they can come up with as the great idea for the day

I bet that on Monday they will announce that face garments must be worn in shops.
I think they may say that on Monday for shops as well, but at least they can say they are following WHO advice!
They won't, in all honesty, be able to say they are following the 'science'!!!
But even 2 metres isn't agreed on by all countries/all scientists - WHO recommends 1 metres, other 'experts' say 2 metres isn't far enough.
All you can do is your best, which hopefully will be good enough. I will make my own judgements on some things, and I will try to follow the law, though as it changes every week or so it might be difficult to do.
Little old grans and others with no internet access or family/friends to keep them updated could fall foul of the law.
Regards Margaret
With regards the distance of two metres it has been explained on various occassions why this was chosen rather than 1 metre.
Here is the BBC version by David Shukman Science editor -
"In a study published in the medical journal The Lancet, scientists evaluated recent research into how the coronavirus can spread.
They conclude that keeping at least 1m from other people could be the best way to limit the chances of infection.
The risk of being infected is estimated to be 13% within 1m, but only 3% beyond that distance.
And the study says that for every extra metre of distance up to 3m, the risk is further reduced by half."
However that is only part of the equation as not only is distance important but also the longer you spend in close proximity with an infected person, the bigger the risk.
Scientists advising the UK government say that spending six seconds at a distance of 1m from someone is the same as spending one minute at a distance of 2m.
Being exposed to someone coughing is riskier. Being 2m away from a cough carries the same risk as someone talking to you for 30 minutes at the same distance.contact.
If that research is accurate then the compromise Canada, Spain and the UK take is sensible as it takes into account variations due to time & distance.
Cheers
Guy