brigades lose their units permanently with the following changes occurring to the former units: Grenadier Guards and Welsh Guards transferred to London District (on rotation) and replaced by the Coldstream Guards and Irish Guards respectively, Royal Gurkha Rifles moved to 16th Air Assault Brigade, The London Regiment transferred to London District, and the 3rd Royal Welsh moved to the 12th Armoured Infantry Brigade. Under the changes, the Coldstream and Irish Guards moved from London District, the 3rd Princess of Wales's Royal Regiment moved from 7th Infantry Brigade, and the 1st and 2nd Battalions, Royal Irish Regiment moved from 160th (Welsh) Brigade. In 2019 with the brigade completely reorganised, its structure was now as follows by the end of 2021: Brigade Headquarters, at Taurus House, Aldershot Garrison 1st Battalion, Irish Guards, at Lille Barracks, Aldershot Garrison (Light Mechanised Infantry with Foxhound armoured cars) 1st Battalion, The Royal Irish Regiment, at Clive Barracks, Ternhill (Light Mechanised Infantry with Foxhound armoured cars) 1st Battalion, Coldstream Guards, at Victoria Barracks, Windsor (Light Infantry) 3rd Battalion, The Princess of Wales's Royal Regiment (Army Reserve), HQ at Leros Barracks, Canterbury 2nd Battalion, The Royal Irish Regiment (Army Reserve), HQ at Thiepval Barracks, Lisburn 11th Security Force Assistance Brigade On 30 November 2021, the Future Soldier changes were announced, and the brigade will transition from an infantry brigade into a security force assistance formation. In late 2021, the brigade was renamed as 11th Security Force Assistance Brigade, dropping its regional commitments, and will reorganise by 2022. The brigade's mission was described as follows: The brigade headquarters will remain in Aldershot, drop its regional commitments, and unit moves will be as follows: Coldstream Guards move to 4th Light Brigade Combat Team (BCT) – formerly 4th Infantry Brigade & HQ North East; 2nd Royal Irish Regiment move to 19th Reserve Brigade – a new formation; 3rd Princess of Wales's Royal Regiment moved to 20th Armoured BCT as mechanised infantry; 1st Royal Irish Regiment moves to 16th Air Assault Brigade as 'light strike reconnaissance infantry'; and the Irish Guards will remain part of the brigade. The following units will join the brigade in 2022: The Black Watch (3rd Battalion, Royal Regiment of Scotland) from 51st Infantry Brigade; 1st Royal Anglian Regiment from British Forces Cyprus (will join on return from Cyprus in 2023); 3rd The Rifles joins in 2024 from 51st Infantry Brigade; 4th Princess of Wales's Royal Regiment joins