Mayor of London Boris Johnson believes the aborted strike on London Underground was broken by commuter power.
RMT say "the ball is in management's court" while London Underground claim "the ball is now firmly in the RMT leadership's court".
The fight broke out as the train approached Aldgate East station on Monday night, hours after the Tube strike began.
The conciliation service Acas has confirmed it will host new talks between the Rail, Martime and Transport union and Transport for London in an attempt to resolve the London Underground dispute.
Members of the RMT union are preparing to strike for a further three days from 9pm on Monday 5th May if a resolution cannot be found.
RMT accepts invitation to ACAS on Friday. @itvlondon
- London Underground says 52% of Tube services are operating today
- Around 80% of stations are open, more than yesterday
- Around 90% of the usual number of Oyster cards were used on overall TfL network this morning
The two sides in the tube strike expected to return to ACAS on Friday. @itvlondon
TfL says all tube lines open including for the first time on a strike day the Waterloo & City. @itvlondon
There are more transport problems in the capital because of fog this morning.
TfL suspended ferry services on the Thames because of poor visibility, saying Thames Clipper tickets were being accepted on local buses and Docklands Light Railway.
London City Airport in Docklands also reported delays to flights due to poor visibility.