16 October 2021 – The 4DD Group has joined the Heritage Railway Association as Corporate member  – see our NEWS page

Bulleid 4 DD

Conceived by OVS Bulleid for the newly nationalised Southern Railway’s commuter route from London Charing Cross to Dartford, the two 4DD (Double Deck) EMUs were the only double-deck trains to run on the main 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 The trains were withdrawn in 1971, and only two coaches from one of the units remain both in poor condition and in need of some care and attention.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. It supports the Facebook interest Group Bulleid Southern Railway 4DD EMUs.


If you would like to join us in the work to restore these historic trains or would like to make a donation to enable us to continue the work, please get in touch with us by our contact pages at the top of this page so that we can arrange the best way for you to do this.