Babcock Rail built 22 KAA 'Mega3' pocket wagons in 2002 numbered BCC11501-22. Their innovative design with a 2.55m wide pocket allows them to carry

• 2x 20ft Containers,
• a single 40ft or 45ft Container (up to 2.9m/9ft6in tall),
• a C45 swap-body (up to 13.6m x 2.55m high) or
• a road trailer (up to 13.6m x 3.4m high).

Funded by the UK Strategic Rail Authority, the wagons were supplied to Blue Circle Cement in 2003 along with 15 specially-designed Feldbinder cement hoppers and 8 curtain-sided trailers. Services ran from Hope to Selby and Westbury to Southampton, but eventually proved uneconomic.

Purchased by NACCO, the wagons were transferred to the continent in 2008, being re-coded IXA (UIC Sdffgss) and renumbered 37 80 4905 001-022.

The wagons returned to the UK, now owned by VTG, to operate a new twice daily Immingham to Doncaster iPort shuttle service, the Humber Express, in October 2021.

https://flickr.com/photos/187103899@N08/galleries/72157720385361210/

The prototype wagon runs on 730mm wheels in Y33 bogies. The N Gauge Society Fabricated Y25 Bogie, ideally fitted with 5mm wheels, is suitable.

Clearances are tight on this model and some careful filing of the chassis and bogie frames might be needed to allow sufficient bogie swivel.