8 hours ago Chris Mason Political editor Leon Neal/Getty Images Wes Streeting arriving at Downing Street on Wednesday morning The State Opening of Parliament is the most British of occasions - and on Wednesday it had the most British of ingredients: royals, regalia and rain. But it had more than a splash of unconventional ingredients too. Well before the King arrived in Parliament, the health secretary, Wes Streeting, was having coffee with the prime minister in Downing Street. It was a swift visit - Streeting was in and out of the No10 door in just 17 minutes. What happened in there? We don't know, but business was clearly conducted swiftly. What we have been told is that the health secretary's allies expect him to challenge Sir Keir Starmer as soon as Thursday. Alongside the plotting on Wednesday, the pomp too, with the King's arrival in Parliament, where - from the throne in the House of Lords - he outlined the government's proposals for 37 bills and draft bills.…