Royal Mail workers are set to walk out on Thursday, September 8, and Friday, September 9 as they continue their dispute over pay and working conditions.
They have also announced further strikes set for later in September as the dispute worsens.
Last month saw 115,000 postal workers begin the first of four days of industrial action after members of the Communication Workers Union (CWU) voted by a majority of 97.6% in favour of taking action.