LONDON – It looks a little scary there on the homepage of U.S. Embassy in London: the word ALERT. The State Department is warning Americans “to keep a low profile” and “be aware of your surroundings” this week. The reason: demonstrations are planned against President Donald Trump, in London, as well as Windsor, Bristol, Newcastle, Leeds, Cambridge, Cardiff, Glasgow and the west coast of Scotland, where Trump has a golf course. While Trump on Friday is having lunch with Prime Minister Theresa May at her Chequers country estate or sipping tea with Queen Elizabeth II at Windsor Castle, tens of thousands of demonstrators – maybe more – are planning to gather in London’s Trafalgar Square to protest the president and his policies. The demonstrators plan to loft a large blimp-like balloon over the skies beside Westminster Palace, depicting a bronzed “Trump Baby” in a pair of nappies, clutching a mobile phone. Trump will spend Thursday night in London at Winfield House, the official residence of U.S.