From
The MirrorSeats on seven of London's underground train lines are never washed despite being sat on by millions of bums every day.
A Freedom of Information request from the Metro revealed the upholstery on the District, Jubilee, Northern, Circle, Piccadilly, Metropolitan, and Hammersmith and City lines are never shampooed.
The only lines where seats do get a soaping are the Bakerloo, Victoria and Central, but that only happens every six months to a year.
What are the cleaning rotas like for
GWR▸ trains?