Andrew, have you done any tests? Nearly all my immediate family (Myself, my wife and daughter, my parents, my mother in law, both sister in laws and one of their husbands) all had new coughs, sore throats, sneezes - pretty much textbook cold symptoms but also this new variant symptoms too. Covid was tearing round my daughter's school in the last week or two of term.
Yet every lateral flow and even a couple of PCRs when children in her class tested positive have showed consistently negative. I saw something about an estimate of 50% of "colds" at present are this new variant. Maybe the tests don't work, but with them all negative we have carried on regardless.