Welcome to the Bulleid 4DD EMU Supporters Group website

Conceived by OVS Bulleid for the newly nationalised Southern Railway’s commuter route from London Charing Cross to Dartford, the two 4DD electric multiple units were the only double-deck trains to run on the main line railway network in Britain.

The 4DD Double Deck units were a unique experiment in UK train design, an experiment which carried on in service for over 20 years. The trains were withdrawn in 1971, and only two coaches from one of the units remain both in poor condition and in need of some care and attention.

This website is dedicated to the history of the 4DD Class Electric Multiple Units. It supports the Facebook interest Group

If you have an interest in the 4DD units, or any photographs or memories of the unit either in service or in later life that we could use please let us know via the contact page.