complete unit was saved for preservation, as were a number of individual vehicles. The complete 4-COR(N) 3142 was purchased by the Southern Electric Group for preservation by British Rail in 1972 and moved to the since defunct Steam Centre at Ashford (Kent). In 1976 it was moved north to the Nene Valley Railway and helped form the opening train in 1977. The unit came south again to Brighton in September 1986 for restoration work. The unit was moved again to St Leonards Engineering Depot in 1991 as better facilities aided restoration. By 2003 the unit had to be moved to the Bluebell Railway, with S11187S going to the London Transport Museum at Acton. Later on three of the unit's coaches were moved to the East Kent Railway, with one coach remaining at Horsted Keynes station as an exhibit coach. In late 2012 S11187S was moved to join the three more coaches at the East Kent Railway. The unit has been operational as a two coach hauled unit since July 2013; the Southern Electric Group continues further restoration work on the unit to date. In June, 2017, DMBTO 11201, TCK 11825 and TSK 10096 were moved to a site in Kent and sheeted. Details are set out of surviving vehicles below: References Source External links Southern Electric Group - Owners of Set no. 3142. Southern Electric Group - Details of class designation. 4COR 404 Train-related introductions in 1937 600 V DC multiple units 750 V DC multiple units