Rail union RMT has suspended this weekend's strike on South Western Railway to allow further talks between the two sides.
Saturday's 24-hour action has been postponed after a flurry of correspondence between the union and the train operator over guards.
RMT general secretary Mick Cash said: “RMT has continued to work hard to reach a negotiated settlement in the South Western Railway guards' safety dispute and after a flurry of correspondence with the company this week our executive has agreed to suspend this weekends strike action to allow for further talks on the specific issue of the guard guarantee.
“The rest of our planned action remains on and the union remains committed to negotiating a settlement with SWR in line with other recent agreements with train operators that protects safety, security and access to services.”
A South Western Railway spokesperson said: "We are pleased for our passengers that this strike has been called off to allow further talks to take place. This means we will be running a full Saturday timetable on 11 August."
SWR, which runs trains from some of London's busiest stations including Waterloo and Clapham Junction, has been dogged by industrial action over the past year because of a dispute with the Rail, Maritime and Transport (RMT) union over safety guards.
The operator is being targeted with eight strikes over the summer.