Boris Johnson says he is "furious" and "apologises unreservedly" after the emergence of a video showing government aides seemingly joking about holding at Christmas party in Downing Street during Covid lockdown in 2020. The prime minister denies a party took place but announces an investigation by the cabinet secretary into the issue. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn