For those saying about time consider that this requirement could be the end for many airlines. Once in place it will likely take 6 months to be revoked. Few people are going to travel on holiday with the need for extra tests on the return and what business travellers there are will reduce further.

When a virus is endemic in the population you are not going to make it go away by stopping a few travellers. It will go away only in its own time or through the vaccination process. There are lateral flow setups ready in LHR and probably elsewhere that could have been put in use months ago but no the government has just thrown away another hundred thousand jobs for no reason.