It's a period likely to affect those on the lower rungs of the scientific ladder. Most profoundly, allie says, new p is in barely stable situations. I don't think anybody has really begun to grasp how massive an effect this is going to hap. On the 20 third of march, u k, prime minister boris johnson addressed the nation from this evening. He must give the british people a very simple instruction. You must stay at home, locked down, for three weeks, enforced by the police.