Re: Covid new strain.
A swift read through, of this Topic (if a swift read through is possible) tells me that there are, really, only two arguments (hypotheses?) being repeated, over & over.
1) The Racist argument which suggests that some are attacking immigrants, many of whom are seeking safety from persecution back in their own Country.
2) The opposite argument which is based on the possibility of travellers picking up the virus, where they started, or on the way, and bringing the virus to the UK.
IMO, the best approach would be to "Eliminate the impossible" (as said by Sherlock) and buy into the fact that all we have left is the "Improbable".
So, again, IMO, what we should be doing is putting in place a solid system of checking all who enter the UK.
This is already happening in Airports, Ferry terminals,(I think) but, surely, we cannot dismiss the need to find and check the "illegals" as those people, however personally innocent they may be, must be vulnerable and so capable of bringing in and passing on the disease.
No ifs, no buts, they must be found, tracked & checked!