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The stabbing happened near the station's short-stay car park by Fairfield Street. Paramedics took the victim to hospital and he has since been discharged, a BTP spokesman said. Det Insp Kite said: "We have spoken to a number of witnesses... but we believe there may be other people who saw what happened and have yet to come forward. "We also believe there were people who had been driving past who may have captured important dashcam footage showing what happened. "I urge those people to make contact with us as quickly as possible. "We will not tolerate violence on the railway network and will do everything we can to bring to justice those responsible."