Jeremy Corbyn joined protesters at King’s Cross station in London as they demonstrated against a 3.1% rail fare rse.
Mr Corbyn said today's rail fare increases are "not justified" and that the price hike "drives people away from public transport".
He said fares for the British passengers are "already the highest in Europe" as he joined campaigners calling for a Government freeze on prices.
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Responding to the Transport Secretary Chris Grayling saying the rise is needed to fund the upkeep of the network, Mr Corbyn says we must "invest in our railways as a public investment", adding: "If we don't invest then people will have to to suffer in their journeys, and we end up with more people using their cars and that's far more dangerous for our environment than rail travel."
Pressed whether it was fair to ask taxpayers to subsidise commuters, he replied: "All public transport is subsidised in one form or another, and there is a public good from it.
"No other country in the world has a transport system that sits completely alone."
Members of the Labour Party, Momentum and the Rail, Maritime and Transport (RMT) Union protested at stations across the UK, including Manchester, Liverpool, Leeds, Walsall and Whitehaven.
London fare freeze
Londoners, meanwhile, had fares across the Tfl network frozen by mayor Sadiq Khan until 2020.
It’s the third year in a row that Mr Khan has frozen fares across the network - with the price of pay-as-you-go fares on the tube, Docklands Light Railway (DLR) and London buses remaining the same as they were in 2016.
Mr Khan said: “Our TfL fares freeze is in contrast to the private rail companies hiking up fares again, despite the litany of cancellations, delays and overcrowding on services like Southern and South Western Railway.
“Given the continuing woeful services on suburban rail routes, the increase in rail fares of 8.8 per cent over the last three years is simply a disgrace.”