London Underground said a good service was running on all Tube lines today despite an earlier strike in protest over the sacking of a driver.
Members of the Rail, Maritime and Transport union walked out for six hours from 9pm last night, with longer strikes planned next week, which would hit the Wimbledon tennis championships.
The RMT is calling for the reinstatement of the driver, Arwyn Thomas, who is waiting to hear from an employment tribunal whether he has won his claim of unfair dismissal.
LU said a good service was operating on all 11 lines this morning, with only "minor service alterations" last night, with all last trains running to time.
Managing director Mike Brown today reiterated his call for the RMT to await the outcome of the employment tribunal process.
"This strike action has not achieved anything and I once again call on the RMT leadership to calmly await the outcome of the employment tribunal without any further strikes.
"I have given the RMT leadership a written assurance that if the tribunal rules that we should reinstate or re-engage Arwyn Thomas, then we will do so. I give that assurance again now, so there can be no justification whatsoever for the RMT to continue to threaten Londoners with more pointless strike action."
RMT leader Bob Crow said the strike had kept the case in the spotlight, while the union had complied with the legal obligations under employment law.
"It is now down to London Underground to do what we have been calling for all along and that is to put this injustice right and agree with us a mechanism for getting Arwyn back to work in advance of the next phase of action."