Structure of the British Army

The British Army as a result of the Army 2020 and Army 2020 Refine reforms has been organised into two main commands, Field Army and Home Command, each commanded by a lieutenant general.
The Director of Overseas Bases, responsible to the Commander, Strategic Command, controls a number of other British Army units of battalion size and smaller, in the overseas bases (Gibraltar, Cyprus, and BFSAI/Falklands; British deployments in the British Indian Ocean Territory and Singapore do not have formed British Army units present), but these units are responsible to Commander Strategic Command, not to the Chief of the General Staff. 
For those units that are under administrative, but not operational control of the Army, see Structure of the British Armed Forces, and Structure of the Royal Air Force.
Field Army.
The units under Field Army are:
Field Army gained initial operating capability on 30 November 2015 and was formed as a result of the 2015 Army Command Review. The Commander Field Army commands all the formations of the British Army's forces for operational tasks, its collective training and tactical doctrine organisations and includes the vast majority of the Army’s fighting equipment.
3rd (United Kingdom) Division.
Division referred to as the "Reaction Force"
Home Command.
Home Command consists of:
Commander Home Command, is also the Standing Joint Commander (UK) for responsible for the planning and execution of civil contingency operations within the UK landmass and territorial waters.
Headquarters Regional Command.
Headquarters Regional Command at Montgomery House, Aldershot is commanded by a Major-General. It is the Army's HQ for the UK, Nepal and Brunei, administering Army bases in the UK and providing civil engagement. . Headquarters Regional Command is also the operational command for the Army Cadets. 
Army Recruiting and Initial Training Command.
Army Recruiting and Initial Training Command was established on 1 April 2018, and oversees the Army Recruiting Group, which includes the National Recruitment Centre (NRC) and local Army Careers Centres, and is staffed by a mixture of Capita staff and Army personnel.
Army Training Units (ATU) are commanded and staffed by UK Army Reservists. Along with Regular Army Training Regiments (ATR), they provide Basic Training to Army Reserve recruits, except those joining 4 PARA. Reserves recruits are selected at an Army Recruit Selection Centre. They then undertake a short basic training course known as ‘alpha', over four weekends or a residential week. The alpha course is followed by a 15.5-day residential 'bravo' course to achieve trained soldier status. These generic courses teach essential elements of the Regular Common Military Syllabus 2014 (CMS 14). Recruits will then attend Initial Trade Training courses as stipulated by their cap badge / Corps. The Honourable Artillery Company currently runs its own alpha course twice a year. The current ATUs include: 
Army Personnel Centre.
The Centre is located in Glasgow. The APC's Chief Executive is the Military Secretary, who also holds the post of General Officer, Scotland. The APC deals with personnel issues and contact with outside agencies.
Sandhurst Group.
Commandant Sandhurst is a Major-General. The day-to-day running of the Academy is, however, devolved to a brigadier, currently Brigadier James Carr-Smith who is titled Commander Sandhurst Group and responsible for:
Corps and detached units.
Royal Corps of Army Music.
In 2019 the Corps of Army Music was restructured with a number of bands being co-located and re-named. In a process of 'Military Music Optimization', the regular Army band laydown was adjusted to enable several smaller bands to train and perform as larger bands for more significant Army events: 'Co-locating 11 of the smaller bands in three major garrisons and Sandhurst has increased the flexibility of CAMUS to perform at a huge breadth of events without compromising any of the traditional bands that have been performing for many years'.
During a visit to Kneller Hall in December 2020, the Earl and Countess of Wessex announced the Corps of Army Music would be renamed the Royal Corps of Army Music from January 2021. This change was formally marked with a new title presentation in January 2021 with the Countess of Wessex in attendance.
Below is a list of the current bands with their subordinated bands, locations, and the command they report to:
Royal Armoured Corps.
The Royal Armoured Corps (RAC) provides the armour capability of the British Army. It combines speed, momentum, firepower and reconnaissance capabilities with armoured fighting vehicles such as the Challenger 2 Main Battle Tank and Jackal Fighting Vehicle. In the RAC, the term 'Regimental Headquarters' is used for each battalion sized 'regiment', whole the term 'Home Headquarters' is used for each regiment's depot.
Organisation and Equipment.
Royal Armoured Corps
Infantry
Royal Artillery
Footnotes.
Citations
Notes