The Obamas and Clintons are in London London is to be the scene of a reunion between former U.S. presidents this weekend. I hear that Barack Obama, who is over for his wife Michelle's talk at the huge 02 Arena tomorrow, is planning to meet up with Bill Clinton, also in the capital with his wife, Hillary. I wonder if the Obamas will pop into Frogmore Cottage to see their friends Prince Harry and Meghan while they're here? From last year... Mrs Obama is set to visit the O2 on April 14 next year, the arena has a capacity of 20,000.  The tour has been extended to include another 21 events in 2019 across Europe and North America, with 11 in the US, four in Canada and one each in the UK, Denmark, Sweden, Norway, France and the Netherlands. The wife of the 44th US president, Barack Obama, will also visit Paris on April 16 after postponing the French capital's original December 5 event to attend the funeral of former US president George H W Bush.