Sir David Amess: Man arrested to be kept in custody until October 22

In a statement, Scotland Yard said: “Late on Friday, whilst in police custody, the man was subsequently further detained under section 41 of the Terrorism Act 2000 and he is now being held at a London police station.

“On Saturday, detectives were granted a warrant of further detention at Westminster Magistrates’ Court, allowing them to keep the man in custody until October 22, when the warrant expires.

“As part of the fast-paced investigation, officers have attended three addresses in the London area and conducted searches. One of these searches has concluded and the others are ongoing. A post-mortem examination has taken place today.”

"Detectives would urge any witnesses or anyone with information about this incident to contact police. If you have any information that could assist the investigation, please call police in confidence on 0800 789 321."