The organisation of the British Army and how it divides its personal is interesting and complex. From doing an approx. search it could be loosely classed as the following if anyone knows any more detail please add to the comments.
|Category||Amount of Soldiers|
|Squadron||2 or more troops|
|Company||150-200 part of a battalion|
|Army||2 or more Corps|
Comprises 7-12 soldiers, part of a platoon. A Sergeant or Corporal is often in charge
Can comprise 25-30 soldiers part of an Infantry company and subdivided. A Lieutenant or 2nd Lieutenant often in charge
Similar to an Infantry platoon part of a cavalry, battery or squadron a Lieutenant being in charge
A section of a Battalion, 150-200 soldiers given alphabetic codes or a name. A Major or Captain is in charge.
A subdivision of a cavalry, similar to the size of an Infantry company. Possibly two or more troops in size, often engineers, or an armoured section. A Major or a Captain is in charge
Same as an infantry company only dealing with Artillery. A collection of Batteries is now a Regiment. In the past Battalions and Brigades. Major or a Captain is in charge
500-1000 soldiers a subdivision of infantry or signals. They call several battalions a Brigade. A unit of soldiers that have 3-4 companies of a similar size. A Lieutenant Colonel is in charge.
This is a much larger amount of Soldiers often during times of war in the thousands, using infantry, cavalry, armoury. A Brigade can function on its own with support groups, or be part of a Division. A Brigadier or Major General will be In charge Collection of a few regiments and support units that are groups for a specific task.
A few brigades of cavalry, infantry armoury they have support and operate independently. The number of Soldiers can range from 10,000 to 20,000. 3-4 Brigades for a specific role and is a larger scale.
These are a collection of smaller groups of soldiers that have a specialist function. For example, Artillery, Cavalry, infantry different medical expertise, Roman numerals identified them.
Around 650 soldiers
Two or more platoons around 10-12 soldiers.
Have ceremonial and operations duties and will appear at royal functions buildings.