More than a million people in the UK were experiencing “long Covid” in a recent four-week period, according to new survey figures from the Office for National Statistics (ONS). Boris Johnson has given firm backing to the use of Covid passports after the Labour leader, Keir Starmer, suggested the measure would be against “British instinct”. Covid rates are falling in England, and probably in Scotland too, but rising in Northern Ireland, the ONS said. But it said it was “uncertain” from its infection survey what the trend was in Wales. (See 1.34pm.) Prof Chris Whitty, the government’s chief medical adviser, has said that he has been willing to “forcefully” tell ministers to think again if he thinks they are taking the wrong technical decision. But he defers to them on political matters, he told a Royal Society of Medicine webinar. He said there was a spectrum with some decisions which are “purely technical” and others which are “entirely political”. He went on: Depending on how much, where I think it is on that spectrum, will determine whether I actually really forcefully insert myself into the discussion. If I think it’s mainly a technical decision and I think the political leader is trying to take it, I will say, ‘I don’t think that’s your call’. Equally, if it’s primarily a political decision ... it shouldn’t be me trying to make a political decision for a political leader. Fewer than a quarter of people in the UK with Covid symptoms are requesting a test, while only half say they are fully self-isolating after symptoms develop, researchers have found. The Welsh government has set out a detailed roadmap out of lockdown that it hopes will culminate in the reopening of most of the country’s economy, including indoor hospitality, by the end of May. Doreen Lawrence, who campaigned for 18 years for justice after her son Stephen was murdered by racists, has said a government-commissioned report that claimed the UK no longer had a system rigged against minorities could allow racism to flourish. That’s all from me for today. But our coverage continues on our global coronavirus live blog. It’s here.