More train travel misery could be on the way for London commuters after Southern rail workers announced a five-day strike.

Members of the Rail, Maritime and Transport union will walk out from 5pm on July 12. They will also ban overtime over the weekend of July 10-12.

The move follows a 9-1 vote for strikes among union members at Southern.

The RMT said hundreds of engineers were involved in the dispute and warned the strike will hit services.

Action comes after claims of a "comprehensive breakdown" in industrial relations.

Officials said under a 2013 pay settlement, a working group of union reps and managers was set up to find productivity measures that could cut the working week.

The union said the group could not find any way to bring in a 35-hour week with no extra cost to the company.

Productivity measures were subsequently brought in for engineers without leading to a reduction in the working week, said the RMT.

General Secretary Mick Cash said: "RMT will not stand by while agreed policies, procedures and agreements are unilaterally ripped up by Southern and promises on the reduction in the working week are kicked aside despite increases in productivity.”

"In all of this, management have failed to show our members the respect they deserve as skilled and dedicated workers. We have made every effort to talk to the company about these issues, but have got nowhere. The only option we have is to use industrial action.”

Southern said: "We are disappointed that the RMT has decided to take this action at this time in the franchise, especially as we have been having meaningful talks with the union throughout this process about the issues raised."

Workers on London Underground and First Great Western are also due to strike this month, meaning it’s going to be a dismal few weeks for passengers trying to get in or out of London.