Two London Underground strikes over pay have been called off "to allow talks to continue", a union boss has announced.
Commuters in the capital were facing travel chaos this week as Tube drivers prepared to walk out over pay.
The first of several planned 24-hour strikes was set to take place from 12pm on August 3, and last for 24 hours.
A second was scheduled to follow on August 5.
But the National Union of Rail, Maritime and Transport Workers (RMT) has now said normal service will continue - for now.
General secretary Mick Lynch said: "Following extensive and wide ranging discussions through the ACAS machinery we have hammered out enough ground to allow those talks to continue.
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"As a result this week's strike action is suspended although the rest of the planned action remains on.
"I want to thank our members and our reps whose unity and determination has allowed us to reach this stage today and we look forward to pursuing the important issues at the heart of this dispute in the next phase of talks. "
Further strikes are planned for August 24 and 26.
Millions of would-be commuters had previously been told not to use the network after 1pm - or risk travel turmoil.
The Rail, Maritime and Transport union (RMT) announced the potential for strike action on July 27
It described TfL's decision to scrap the pay grade for Night Tube drivers as a "cash-led move aimed at shunting staff around".
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Mr Lynch said previously: "London Underground's proposals to rip up an agreement that protects 3,000 Tube drivers' work life balance has caused uproar in the depots amongst drivers.
Plans changes would see alterations to the way drivers are employed on the Night Tube system, meaning all would work a mixture of day and night shifts, as opposed to employing drivers to solely work the Night Tube as London Underground does currently.
