British Prime Minister David Cameron has signed the Book of Commitment for Holocaust Memorial Day.In the run-up to Holocaust Memorial Day on 27 January, the Book of Commitment is signed by hundreds of MPs every year as a pledge to fight prejudice and hatred.On signing the Book of Commitment, the Prime Minister wrote: “Thank you for your work in reminding us and generations to come of an event in the history of mankind that we must never forget. For some the passing of years and the fact there are now fewer survivors left means this is less significant – it is in fact more important than ever that we recall what happened and the terrible consequences.As well as recalling the dreadful suffering and murder in the ghettos and camps we must also remember the genocide and hatred in our world today. From learning our history we must pledge that it should not be repeated.”