LONDON — U.K. officials don’t think it’s necessary — yet — for citizens to reduce their fuel consumption in response to the energy crisis, despite warnings from leaders in Europe and Australia. While counterparts in Brussels and Canberra have issued warnings about the impact of the Middle East war on energy supply, and urged people to change their behavior accordingly, U.K. Prime Minister Keir Starmer pointedly avoided any such advice when he addressed the nation Wednesday. Asked at a Downing