After 1945 use of the line declined and costs escalated sharply, and it appeared likely that the network would be closed, but the East Suffolk Railway main line was reprieved in 1966. Pioneering cost reduction measures were implemented from that time and in later years, and through express trains were moved to other routes. Sizewell nuclear power stations brought construction traffic to the line, and nuclear flasks are still handled at intervals. At present the line carries an hourly passenger service, consisting of British Rail class 755 bi-mode multiple units.