The Queen is of course concerned by the report of an attack in Woolwich earlier today. Her Majesty is being kept informed.
The spokesperson also confirmed the Queen will visit the King's Troop Royal Horse Artillery at Woolwich barracks on 31st May, which was planned before today's attack.
ITV News has uncovered a video showing Woolwich suspect Michael Adebolajo speaking at a demonstration at Harrow Central Mosque in 2009.
Documents suggest Security Services were trying to recruit Woolwich suspect Michael Adebolajo and had also approached members of his family.
Police in Kenya say they did everything they could to highlight their concerns about Michael Adebolajo.