All links below courtesy of the master list to be found on the Army Museums Ogilby Trust website.  The list below is incomplete and currently covers the East of England, East Midlands and London.  Other regions are in the process of being added.

9th/12th Lancers

Bedfordshire and Hertfordshire Regiment

City and Essex Yeomanry

City of London Yeomanry

Coldstream Guards

Derbyshire Regiment

Essex Regiment and Essex Yeomanry

Grenadier Guards

Herefordshire Regiment

Hertfordshire Regiment
Located within the Hertford Museum in Hertford.

Honourable Artillery Company

Household Cavalry

Inns of Court Regiment

Irish Guards

London Irish Rifles

London Scottish Regiment

Norfolk Yeomanry

Northamptonshire Regiment - see Royal Anglian Regiment

Nottinghamshire Regiment

Parachute Regiment

Queen's Royal Lancers

Royal Anglian Regiment

Royal Artillery

Royal Fusiliers

Royal Hospital Museum Chelsea

Royal Leicestershire Regiment - See Royal Anglian Regiment

Royal Lincolnshire Regiment - See Royal Anglian Regiment

Royal Norfolk Regiment Museum

Scots Guards

Sherwood Foresters

Sherwood Rangers

Suffolk Regiment Museum

Suffolk Yeomanry

Welsh Guards

Westminster Dragoons

Worcestershire Regiment