He may not enjoy the @POTUS handle any longer, but Barack Obama's tweets have proved more popular than Donald Trump's this year.

Despite the current US President's prolific tweeting, it is his predecessor who dominates Twitter's annual list of the most popular tweets.

Mr Obama’s tweet quoting Nelson Mandela, “no one is born hating another person because of the color of his skin or his background or his religion ...” had more than 1.7 million retweets, making it the second most popular tweet of the year.

It was tweeted on August 13 - a day after a white nationalist supporter drove his car into a crowd in Charlottesville.

Two other of Mr Obama's tweets featured in the top ten - both of the others sent shortly before his departure from the White House.

His last tweet as US President, on January 20 said: "It's been the honor of my life to serve you. You made me a better leader and a better man."