Barack Obama drops in on Rishi Sunak on London trip

Former US president understood to have discussed AI and other subjects with PM on informal courtesy' visit

Barack Obama has held talks with Rishi Sunak as the former US president paid a courtesy visit" to Downing Street during a trip to London.

The pair are understood to have discussed a range of subjects during an hour-long meeting, including one of the prime minister's favourite topics, artificial intelligence.