London Underground insisted there was no disruption to Tube services again today despite a strike by maintenance workers which union leaders said had caused problems.
Transport for London (TfL) said Tube services were operating as normal with no significant disruption, with the 48-hour walkout by Rail Maritime and Transport (RMT) union members due to end tonight.
A spokesman said: "After running a good service, with no significant disruption on the first day of industrial action by RMT maintenance workers employed by Tube Lines, Tube services are again operating as normal this morning."
The company yesterday refuted claims by the RMT that the industrial action had caused delays on the District, Piccadilly and Bakerloo lines because signal faults were left unrepaired and drivers were refusing to move trains due to safety reasons.
RMT members employed by Tube Lines went ahead with the walkout after the company failed in a legal challenge to the union's ballot.
Tube Lines work is being taken over by TfL at the end of the month but the RMT said it has concerns over jobs, pay and conditions.
Another 48-hour strike is planned next month unless the dispute is resolved.
RMT leader Bob Crow said: "Rather than wasting money on bogus legal challenges and an army of PR runners and strike-breakers it would make far more sense for the mayor and his managers to get back round the table with RMT and resolve this dispute."