The Metropolitan Police has released this CCTV image of three people they want to speak to in connection with the death of Omer Jama Abdi a year ago. Detective Inspector Jamie Stevenson said he hoped people would recognise themselves in the CCTV pictures and make contact with the police.
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A man reportedly armed with several knives has been arrested in Whitehall on suspicion of planning a terror attack, police have said.
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.
The Old Bailey heard how Syed tried to get weapons online, including a bomb vest, and trawled the web to find a busy area launch an attack.