Data from Spectrum files withheld.  Because of security reasons, the Spectrum organisation will not release many of the specific details of the Yellow Fox VIP, personal security transporter.

Yellow Fox's interior, as seen in 'Dangerous Rendezvous'.

Access to Yellow Fow, from behind.

Clean of any markings to link it to Spectrum. that vehicle is an unarmed, high security vehicle disguised as an Octane, liquid fuel tanker, specially converted into a fully operational conference centre and also provide safe carriage for threatened VIPs. 

It has a combined hydraulic "drawbridge" entrance hatch/ladder at the rear leading into a plush interior, with luxury fixtures and fittings for passengers comfort, such as coffee table, wall vending machines and wine cabinet, etc.  

The Yellow Fox transporter is powered by a special form of fuel from the Spectrum refinery at Bensheba, driving the 12 wheels (a 4 X 1, front; and 4 X 2, rear), and can attain top speeds of 120 MPH.

The Yellow Fox is an eight seater vehicle (two persons as driver and co-driver, with six as passengers; it can however carry up to ten people (if additional seating is employed) constructed by an unnamed firm for the Spectrum organisation.

The Yellow Fow is presumable made from bullet/rocket-proof, hardened Fleetonium allow (with internal "roll-cage" and bracing).  The tanker is also painted a distinctive bright yellow colour.

(Sources: TV Century 21 material (Annuals, books and magazines), Engale Marketing's Century 21 magazine, Issue 15, Winter 1995, Fleetway Magazines, Captain Scarlet & the Mysterons book by Chris Drake & Graham Bassett, Complete Book of Captain Scarlet by Chris Bentley… all related to TV Century 21 material.)