Transport written question – answered at on 6 January 2014.
To ask the Secretary of State for Transport what steps have been taken by (a) rolling stock operating companies and (b) train operating companies to modify rolling stock which does not have retention tanks for effluent.
There is currently no formal or legal requirement to stop train operating companies from discharging toilet waste on to the track or to force rolling stock leasing companies to retrofit controlled emission toilets to those trains that currently discharge waste to the track.
Despite this, the industry is taking steps to reduce the number of trains that discharge effluent to the track. A fleet of older diesel trains in East Anglia is currently being fitted with retention tanks, while the Department is currently considering proposals from a number of operators to extend their franchises, which include programmes to fit tanks elsewhere.
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