RMT general secretary Mick Lynch clashed with Good Morning Britain’s Richard Madeley after the presenter described the latest wave of strike action as “almost sadism”.
Members of the RMT will take part in 24-hour industrial action on Monday over in an ongoing dispute over pay.
Madeley was questioning Lynch on the latest wave of strikes on Good Morning Britain, saying that people were “appalled” at the “act of unkindness”.