See www.APT-E.org for more photographs and information about the Experimental Advanced Passenger Train (APT-E). Including how to join the APT-E Conservation & Support Group at Locomotion the NRM at Shildon.
Three of these prototype trains were built, together with a spare Driving Trailer Second SD3 and Trailer Brake First FV3
Later plans, shown below, did not require the design of the F3 trailer car, but instead used the FV3.
The Intercity Development Train (APT-D) was used in the design of the Mark IV coaching stock.
This idea to quickly convert the three APT-Ps into six APT-Qs requiring only the design and construction of six driving trailer cars.
NOTE: Vehicle liveries and bodyside layouts are for illustrative purposes only.
A document from the CM&EE Department dated June 1977 also includes a reference to APTs for The Channel Tunnel and The Southern Region also a Diesel powered version.