Question to the Department for Transport:
To ask the Secretary of State for Transport, what the estimated annual volume is of human waste and effluent released on rail tracks in England and Wales.
The Department has not made an estimate of how much human waste and effluent is released on to the tracks.
As the number of trains that are not fitted with controlled-emission toilets are replaced by new or refurbished rolling stock, there will be a corresponding and significant reduction of waste released.