NewsgalleryIn pictures: Armed soldiers take to the streets of LondonBookmarkShareNewsByTom Herbert-DNU15:59, 24 MAY 2017Updated10:19, 26 MAY 2017Members of the public can be seen going about their daily business as the army is deployed into London1 of 34Members of the army join police officers on Whitehall, London2 of 34Scotland Yard announced armed troops will be deployed to guard "key locations"3 of 34Armed soldiers walk with a police officer on Whitehall4 of 34984 military personnel are being deployed around the country as the UK terror status is elevated to critical5 of 34Armed soldiers walk with a police officer near Trafalgar Square6 of 34A tourist looks over his shoulder as armed soldiers walk with a police officer on Whitehall7 of 34A member of the army joins a police officer in Westminster8 of 34Changing the guard at Buckingham Palace was cancelled and the Houses of Parliament have closed to the public9 of 34Armed soldiers walk with a police officer on Whitehall as 984 military personnel have been been deployed around the country10 of 34Armed troops have been deployed to places such as Buckingham Palace, Downing Street, the Palace of Westminster and embassies (Image: Jon Vale/PA Wire)11 of 34Members of the army outside 10 Downing Street12 of 34Armed soldiers walk with a police officer past a street stall (Image: Carl Court/Getty Images)13 of 34Armed soldiers walk with a police officer The Clarence pub on Whitehall (Image: Photo by Carl Court/Getty Images)14 of 34The army have been deployed following the terrorist attack in Manchester (Image: Lauren Hurley/PA Wire)15 of 34Theresa May announced that nearly 1,000 troops will be deployed after raising the threat level to critical (Image: Carl Court/Getty Images)16 of 34The military will guard key London sites as part of increased security measures17 of 34Children look on as an armed soldiers walk with a police officer on Whitehall18 of 34The Metropolitan Police Service (MPS) said the measure will 'free up armed officers to carry out patrols'19 of 34Mrs May announced another attack is expected imminently in a televised statement from Downing Street on Tuesday night (May 24)20 of 34Armed soldiers walk up Whitehall towards Trafalgar Square21 of 34Britain's terror threat has been raised to critical by Prime Minister Theresa May22 of 34Members of the army join police officers outside Buckingham Palace23 of 34Buckingham Palace has been considered a 'key location'24 of 34An armed soldier speaks to an armed police officer25 of 34As part of the new security measures, the MPS say more armed officers will be deployed in the city26 of 34The armed officers will perform "proactive operations and targeted patrols, both on foot and in vehicles."27 of 34The raised level follows the suicide bombing at the end of an Ariana Grande concert which left 22 people dead including an eight-year-old girl28 of 34Soldiers are seen at Downing Street as the terror threat is raised to critical29 of 34Mrs May announced another attack is expected imminently in a televised statement from Downing Street on Tuesday night (May 24)30 of 34The Prime Minister said Operation Temperer, which allows military personnel to take to the streets, is now in force31 of 34The threat level has been raised after fears that a "wider group of individuals" could have been involved in Monday night's attack32 of 34Soldiers board buses at Wellington Barracks to go destinations across London33 of 34Soldiers board buses at Wellington Barracks to go destinations across London34 of 34