Face coverings on public transport were made compulsory from 15th June and in shops from 24th July. (This is in England. I believe the dates varied slightly in the other parts of the UK). On 24th July the seven day average of new infections was 668. From then on it never looked back and peaked at just over 25,000 in mid-November. It dropped back to around 14,000 by early December but then took off again before peaking at just shy of 60,000 around January 10th. So whatever effect wearing face coverings had (if it had any at all) it was certainly not very dramatic because infections rose substantially throughout the period from last summer through to January. Of course you could (and supporters of face coverings would) argue that without them the situation would have been a whole lot worse. But there is no proof for this.
//listen to the views of medical proffessionals and scientists rather than some know it all who knows nothing in the pub/ on the golf course//
So let’s do just that then. Let’s go to the very top and look at what the World Health Organisation has to say. In fact the WHO is somewhat ambivalent on the matter. Among many other things it said this (in December 2020):
“At present there is only limited and inconsistent scientific evidence to support the effectiveness of masking of healthy people in the community to prevent infection with respiratory viruses, including SARS-CoV-2 (75). Despite the limited evidence of protective efficacy of mask wearing in community settings, in addition to all other recommended preventive measures, the GDG advised mask wearing in the following settings:” [it then goes on the describe various indoor settings]
So despite there being little evidence to support any benefits, the WHO recommends their use. Their recommendation changed from that which they proffered at the start of the pandemic (which was not to recommend their use), though evidence for the efficacy of face coverings had scarcely altered. The recommendation seemed to change when it became apparent that much of the population found them to be a “comfort blanket” and it appears that attitude prevails among quite a few.
What the WHO is very plain on is the discipline needed to safely wear a face covering. These include fitting and removing it properly, avoiding touching it, storing it when not in use and disposing of it. It makes clear that unless these measures are maintained the limited benefits (such that there are) are unlikely to be earned and in fact the risk from using a face covering incorrectly probably outweigh the limited advantages.