South Western Railway, as part of its franchise award in 2017, has carried out a refurbishment programme on its Class 450 fleet. As part of this, every unit has been deep cleaned with carpets and seat covers replaced and every two seats in Standard Class have had a plug socket fitted. First Class has been reduced to eight seats per set end (16 seats per set), and features new leather seats and tables with wireless charging facilities. As part of this work, Class 450/5s have also been similarly refurbished, and renumbered to their original numbers, so all Class 450s will once again share a common layout.
