Composition of the British armoured brigades

In notes on page 40 of Vol.III of the Official History are given the compositions of the British armoured brigades in the Crusader Battle:

22nd Armoured Brigade
  2nd Royal Gloucester Hussars
  3rd County of London Yeomanry
  4th County of London Yeomanry
  C Battery, RHA
  one troop of the 102nd (Northumberland Hussars) Anti-Tank Regiment, RA

7th Armoured Brigade
  7th Queen's Own Hussars
  2nd/RTR
  6th/RTR
  4th Regiment, RHA (less one battery)
  one troop of the 102nd (Northumberland Hussars) Anti-Tank Regiment, RA 
  
4th Armoured Brigade Group
  8th King's Royal Irish Hussars
  3rd/RTR
  5th/RTR
  2nd Regiment RHA
  102nd (Northumberland Hussars) Anti-Tank Regiment, RA, less one battery
  2nd/Scots Guards