According to the medics I follow on twitter, this new variant is able to escape the vaccine 'immunity'.
Herd immunity , even individual immunity once one had caught covid, was always a complete lie. As everyone should have known. Covid is a coronavirus; the common cold is caused by a coronavirus. Does infection with a cold give us immunity? Like hell it does....
The biggest worry with covid is that the virus damages internal organs and brain cells. It can even reactivate other, dormant, illnesses. Its affects on individuals are completely unpredictable. We don't know who is and who isn't susceptible to long term damage. We are storing up a health time bomb by pretending it's just a mild seasonal illness.
It could be mitigated by decent ventilation (particularly in schools) and mask wearing. But the first would cost money which people, especially the government, are reluctant to spend and the second would be a dead duck if the government tried to reimpose it because if Johnson doesn't follow the rules, any rules,, why should anyone else?