Events are being held around Europe to mark Holocaust Memorial Day with solemn ceremonies at the former extermination camps at Auschwitz and Birkenau, to remember the six million Jewish people and those from other groups murdered by the Nazis. Prime Minister Sir Keir Starmer, who hosted a Holocaust survivor in Downing Street earlier said, "Today and every day, we stand united against antisemitism and all forms of hatred". #HolocaustMemorial #starmer #uk #C4News #Channel4News