Queen Elizabeth’s state funeral is expected to be watched by a record 4.1 billion television viewers around the world. The number – more than half Earth’s population – would make the ceremony on Monday September 19 the most watched live broadcast in history. It would also be approaching double the 2.5 billion people across the world who tuned in to watch Princess Diana’s funeral following her untimely death in a car crash in Paris in 1997 aged 36. Broadcasters BBC and ITV are airing Her Majesty’s send-off live, after the BBC has been hosting rolling coverage on the Queen since her death on Sep…