About 100 RMT union members at South Eastern Trains (SET) are set to strike for 24 hours on Monday of next week.
They are protesting over the threat to ticket office services and 100 jobs posed by plans to replace booking office equipment with automated machines.
The threat of action forced SET this week to postpone plans to cut office opening hours.
But the company was pressing ahead with plans to reduce by 60 the number of ticket-issuing machines in booking offices, and the union’s 100 booking office members still planned to strike.
In a ballot RMT members had voted eight to one for action over the plans, which have also been opposed by thousands of SET passengers.
“The company has had fair warning that RMT members will not accept its plans to remove station staff, and our members have backed industrial action by a huge margin,” says RMT general secretary Bob Crow.
“SET’s plans amount to a massive attack on jobs and services which would leave stations severely understaffed or not staffed at all for long periods.
“The company is threatening to throw away the progress made in the two years since Connex was thrown off the franchise and it was returned to the public sector.”