There are still a number of fleets on the network without retention tanks.
As well as being a health risk to Pway workers and visually unpleasant in station environments there is a direct cost to Network Rail for cleaning up such effluent, estimated at £7.2m per year.
To address this Network Rail and ATOC jointly issued a consultation document today, proposing variable usage charges to recover these costs from TOCs.
The Fact Compiler wonders if this will come to be known as the Track Turd Tax?