In Pictures: Liz Truss appointed as the new UK prime ministerPublished7 September 2022Image source, EPAImage caption, The day began with Boris Johnson making his final speech outside the famous black door of 10 Downing Street. In it he called himself "a booster rocket" that had "fulfilled its function".Image source, ReutersImage caption, Mr Johnson was joined by supporters and Downing Street staff, as well as his wife Carrie Johnson.Image source, PA MediaImage caption, Mr Johnson then travelled to offer his official resignation to the Queen at Balmoral Castle in Scotland. During her 70-year-reign the monarch, 96, has had an audience with her new prime minister at Buckingham Palace in London, but broke with tradition on this occasion.Image source, Reuters Image caption, The Queen later greeted her 15th PM Liz Truss. She was officially invited by Her Majesty to form a government. This is the 14th time in her 70-year reign the monarch has done this, as Winston Churchill was already prime minister when she ascended to the throne. The Queen's audience with a new prime minister is one of her key roles as head of state.Image source, PA MediaImage caption, Ms Truss left a very rainy Aberdeenshire to travel back to London.Image source, PA MediaImage caption, The new Prime Minister made her first speech outside Downing Street later on Tuesday evening. She spoke about cutting taxes, tackling the energy crisis and improving the NHS.More on this storyBoris Johnson: 'This is it, folks!'Published6 September 2022All you need to know about the new prime minister Liz TrussPublished6 September 2022