Flowers are seen placed around a memorial plaque for police constable Yvonne Fletcher, in St. James's Square in London, Britain, November 19, 2015. British police said they had arrested a Libyan man on Thursday over his suspected role in the murder of unarmed policewoman Yvonne Fletcher, who was shot dead outside the Libyan embassy in London in 1984. Fletcher, who was 25 and had joined the police aged 19, was hit in the back by a shot fired from the embassy while she was policing a demonstration by Libyan dissidents against Muammar Gaddafi, who then ruled the North African country. REUTERS/Toby Melville