Deputy Labour Leader Angela Rayner has written a letter to Cabinet Secretary Simon Case calling for an investigation into claims the prime minister hosted a Christmas party last year during lockdown. <br />She said his actions show "a blatant disregard for the rules" and wants to "clarify whether the law was broken". Report by Lewisl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn