These trains are owned by HSBC Rail, and leased back to Southeastern for operation from London to Kent and parts of East Sussex. The first batch of 30 trains (Class 375/6) were fitted with both a pantograph and third-rail shoes for dual voltage, where the remainder of these trains have one coach in each unit with a recess where the pantograph could be fitted, allowing for future conversion to run on AC power from overhead lines. Although the units are normally operated on 750V DC lines only, the class is numbered in the 3xx series which usually refers to AC operation. The options is available for the 375/6 units to be leased to a network which operates on 25kV AC overhead lines. Southern's Class 375 units have since been converted to Class 377. The ex-375s, akin to Southern's 377/3, have a