Warren Buffett’s Berkshire Hathaway reported a sharp 59% drop in second-quarter profit to $12.37 billion, hit by a $3.76 billion writedown on its investment in Kraft Heinz as the food company reconsiders undoing its 2015 merger.The company earned $8,601 per Class A...

Henry ZeffmanChief political correspondentGetty ImagesThe government will restrict civil service internships to students from poorer families as part of a drive from ministers to make Whitehall more working class.The main internship scheme designed to attract university students to the civil service will now only...