LONDON (AP).- A new message is greeting visitors to the home of Britain’s prime minister: “More Passion.” The words, rendered in dazzling neon, are a work by artist Tracey Emin that that is now hanging in 10 Downing St. Prime Minister David Cameron’s office said Sunday that the work was installed earlier this week in a busy hallway, above the door to Downing St.’s Terracotta Room. It stands in contrast to the oil paintings and portraits of former prime ministers elsewhere in the 300-year-old house, which serves as the British leader’s office and London home. Emin said earlier this year that she wanted to hang a piece in Downing St. to give the building “a bit of an edge.” She was invited to install the neon sign by Cameron, a fan of her work. One of the “Young British Artists” who burst onto the art scene in the 1990s, Emin is renowned for her provocative and