They are the UK's oldest passenger trains in regular scheduled use, and are known for their rather tired feel and appearance given they started running in the 1970s.
But a group of volunteers so angered by graffiti-covered carriages on the London Underground's Bakerloo line have taken matters into their hands to clean them up.
The team led by Joe Reeve, 28, are now attracting praise from Transport for London (TfL) train drivers and passengers who have thanked them for their efforts.
Mr Reeve, who is the founder of a policy group called Looking for Growth, has been critical of London Mayor Sir Sadiq Khan - saying he is 'doing what Sadiq Khant'.
Speaking about wider concerns about the state of the Tube, he told The Standard: 'I take the Bakerloo line every morning and I see someone push past the barrier.
