Together they must constitute one of the most remarkable collections of autographs assembled in the UK in recent times.For more than three decades, VIP visitors to No 10 Downing Street would solemnly sign their names in the visitors' book.Now three gilt-edged volumes, covering the years 1970, when Edward Heath was prime minister, to 2003 when Tony Blair was in office, have been released to the National Archives at Kew, west London.

Together they must constitute one of the most remarkable collections of autographs assembled in the UK in recent times.For more than three decades, VIP visitors to No 10 Downing Street would solemnly sign their names in the visitors' book.Now three gilt-edged volumes, covering the years 1970, when Edward Heath was prime minister, to 2003 when Tony Blair was in office, have been released to the National Archives at Kew, west London.