British Rail Classes 445 and 446
|British Rail Class 445 and 446|
|Family name||1972 design (PEP)|
|Number built||2 Class 445, 1 Class 446|
|Formation||2/4 cars per trainset|
|Maximum speed||75 mph (121 km/h)|
|Electric system(s)||750V dc third rail|
The PEP Stock were prototype electric multiple units used on British Rail's Southern Region during the early 1970s. They were forerunners of the BR Second Generation electric multiple unit fleet. Three units were built, one two-car unit (2001), and two four-car units (4001/4002). Under TOPS, they were allocated Classes 445 (4PEP) and 446 (2PEP).