[4] Three Mk I vehicles were modified for use by the British royal family and the cabinet ministers and were known as "Special Ironside Saloons".

[8] The only difference from the Mk III was additional vision ports at the front angles of the hull.

[5] Built for VIP use, Thrupp & Maberly provided a relatively luxurious interior which was split by a Perspex screen to separate driver and passengers.

Two Ironside 'specials' of this kind were used by cabinet ministers and members of the royal family, while six minus the privacy screen were used as armoured staff cars.

A number of vehicles are preserved in museums: A reproduction also exists in private ownership in the Czech Republic[10] A replica built on a postal jeep chassis and with wooden armour exists in Florida, where it is primarily used for re-enacting.