 The final sets were used on peak trains, and were withdrawn on 25 June 2004 after the return of the five Class 322 units which had been on hire to ScotRail.With all sets on the London Liverpool Street to Southend service having been replaced by 321 units, the last service to survive east of Shenfield junction was the early morning 12 car service from Southminster to London, where 321 units could only operate in 8 car configuration.c2c (operating the London, Tilbury & Southend franchise) inherited 21 units, 312729/730/781-799, later supplemented by the four former Central Trains units 312725-728.