The British Army does not have its own specific ensign, unlike the Royal Navy, which uses the White Ensign, and the RAF, which uses the Royal Air Force Ensign. Instead, the Army has different flags and ensigns, for the entire army and the different regiments and corps. The official flag of the Army as a whole is the Union Flag, flown in a ratio of 3:5. A non-ceremonial flag also exists, which is used at recruiting events, military events and exhibitions. It also flies from the MOD building in Whitehall.
Whilst at war, the Union Flag is always used, and this flag represents the Army on the Cenotaph in Whitehall, London (the UK's memorial to its war dead). A British Army ensign also exists for vessels commanded by a commissioned officer, the Blue Ensign defaced with the Army badge. Army Vessels are operated by the Maritime element of the Royal Logistic Corps.
Each Foot Guards and line regiment (which does not include The Rifles and Royal Gurkha Rifles (RGR)) also has its own flags, known as Colours-normally a Regimental Colour and a Queen's Colour. The design of different Regimental Colours. vary but typically the colour has the Regiment's badge in the centre. The RGR carry the Queen's Truncheon in place of Colours.