Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince Harry of Wales attend the Grenfell Tower National Memorial Service held at St Paul's Cathedral on December 14, 2017 in London, England. The Royal Family and Prime Minister will join survivors of the Grenfell Tower at the memorial at St Paul's Cathedral for the six-month anniversary which killed 71 people. About 1,500 people are expected to attend the multi-faith service.