The NUJ has announced that south London Newsquest journalists have called for a 12-day strike in a dispute over redundancies, staffing levels and pay.
The action was sparked after Newsquest announced restructuring plans in the region affecting around 17 publications, risking job cuts, redundancies and editorial mergers.
As a result, strike action will commence Monday 15 June and continue to Friday 26 June.
A spokesman for the NUJ chapel said: "We have a very strong mandate for action from our members. We would prefer not to have to take strike action, but the management's decision has given us no option.
“We care about our readers and the communities we serve. Further cuts to staff will have an effect on the quality of the newspapers we produce and will add to the already-low morale among poorly-paid staff. The union remains willing to seek a resolution to the dispute with management."
The Croydon Guardian, Sutton Guardian, Epsom Guardian, Wimbledon Guardian, Wandsworth Guardian, Balham and Tooting Guardian, Mitcham and Morden Guardian, Kingston Guardian, Surrey Comet, Elmbridge Comet, and the Richmond & Twickenham Times, and News Shopper editions in Dartford, Lewisham, Greenwich, Gravesend, Bexley and Bromley will be affected by the plans.