Class 309

The Class 309 was built for Great Eastern AC electric routes out of Liverpool Street to Clacton and Walton. Based on the Mark 1 coach design they had a high performance being intended for express passenger duties and were the first BR EMUs (officially) capable of reaching 100mp/h [1].

As built the 309s were in 2 and 4 car sets though the 2-car 309/1s were strengthened in the 1980s to 4 car sets by the addition of loco-hauled Mark 1 stock [2]. Restaurant facilities (the griddle cars) were however removed at the same time from the 309/2s.

Information
Number built: 76 cars (2 and 4 car sets)
Built: 1962-63
Builder: BR York, Wolverton
Engine: 4 GEC WT101 traction motors per unit (25kV AC OHLE)
Power: 1, 128 hp (841 kW)
Formation: (309/1) Driving Motor Brake Standard Corridore (DMBSK)+
Battery Driving Trailer Standard (BDTS) (later) Driving
Motor Brake Standard (DMBS)+Trailer Standard (TS)+
Trailer Composite (TC)+BDTS
(309/2) Battery Driving Trailer (BDTC)+Motor Brake Standard
Corridore (MBSK)+Trailer Restaurant Buffet (TRB)+
Driving Trailer Composite (DTC)
(309/3) BDTC+MBSK+Trailer Standard Open (TSO)+DTC (later)
BDTC+Motor Brake Standard (MBS)+TS+DTS

In the privatisation era some units moved to the North West where they continued in service around Manchester but these were withdrawn in 2000. A couple of units were converted to departmental use testing cab-signalling as the Class 960/1. These were preserved in 2009.
309 616 in "Jaffa Cake" London & South East Sector livery

960 102 at the Electric Railway Museum
Front view of 309 616

[1] Alec Swain, Overhead Line Electric Multiple-Units (Ian Allan, 1990) p. 48
[2] Colin J. Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013) p. 227