BBC4 documentary "Bombay Railways"

Having watched the BBC4 documentary called "Bombay Railways", I've found a 20 minute segment on the fascinating two-part observational documentary. The programme looks at the incredible organisation that is the Bombay Railway, with stories of the people who keep the trains running 24 hours a day, those who survive because of it - and those who die on it.
The documentary is repeated on BBC4 sporadically so keep checking!