Kay, 34, realised her period was late a month into Britain’s lockdown. The coronavirus death count was spiralling across the country. Covid-19 was putting the NHS under unprecedented strain and Boris Johnson had given the British people what he described as “a very simple instruction” in an address to the nation from Downing Street: “You must stay at home.” A worrying, unsettling time, and Kay, a mother of a six-year-old girl, needed to get hold of a pregnancy test kit. She went online and, two days later, took delivery of the test, learning of a positive result via two pink lines. It was the news she had dreaded.