Union leader Bob Crow has suggested that those who want to ban strikes would be acting like "Hitler before the war".
Mayor of London Boris Johnson said a change in the law was needed to curb strikes, with some suggesting a 50 per cent minimum threshold in ballots for industrial action would help prevent disruption.
London commuters have faced major disruption with two-thirds of Tube services suffering as a result of the strikes.
Union leaders were under pressure tonight to call off the strike after it emerged new peace talks would take place on Friday.
Bob Crow has told ITV News that he does not use ticket offices at London Underground stations.