The Libyan Prime Minister has laid a wreath at the place where Wpc Yvonne Fletcher was shot dead outside of the Libyan Embassy in 1984.
He paused just for a few seconds before moving on to a speech at Chatham House nearby.
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The Malaysia Airlines plane vanished on March 8, 2014, while flying from Kuala Lumpur to Beijing with 239 people on board.
Michael Rotondo, 30, has been living at his parents' house for the last eight years.
The horse had unseated his rider and was running loose when presenter Hayley Moore grabbed the reins.