Army 2025 ORBAT (some parts are incomplete):
Note: This ORBAT goes right down to company or even platoon/troop level, revealing all possible units in all battalions/regiments/brigades as they are currently named. I can’t find the names for some units, so any help with official sources as proof would be appreciated. Army 2020 Refine is evolving, so some of the units names/positions stated may change. This ORBAT covers mainly those under Commander Field Army and HQ London District.
If you like a more simplified version, here is the original Army 2020 Orbat:
and here is the new Army 2020 Refine ORBAT (will be edited):
Some of the information stated has been obtained through FOIA requests. Email me if you want to know more).
The “Army 2020 Refine” location changes, unit changes and equipment changes are in purple and bold.
See also this FOIA answer (not by me!) Some unit changes and equipment changes in Army 2020 Refine
See also this Force Troops Command Overview and Brigades Media File
and this ORBAT for 16 Air Assault Brigade (minus the AAC Attack Helicopter and support regiments, now moved under Joint Helicopter Command while 16AA goes under Commander, Land Forces .)
Again this is far more accurate than some other defence commentators.
Note: The URLs in the PDFs may be broken or outdated. It’s not my fault; the armed forces and their external hosts constantly change their website or remove information.