The key facts behind the day's headlines on April 17 as Professor Danny Altmann, a professor of immunology, said he thought India “ought” to be placed on the Government’s “red list” of hotel quarantine countries as the variant first discovered there could “scupper” Boris Johnson’s road map out of lockdown.Despite the warning, Downing Street insisted the Prime Minister’s trip to India later this month will go ahead, although it will be drastically scaled down.