Workers at IT giant Fujitsu are to stage a series of fresh strikes in a long-running dispute over pay, jobs and pensions.
Members of Unite will walk out for 48 hours from May 18 and May 25 and for 24 hours on May 22 in addition to a 24-hour stoppage on May 8 and a 48-hour strike on May 11.
Workers taking action are based at a number of sites including Belfast, Birmingham, Crewe, Edinburgh, London, Manchester and Warrington.
Unite national officer Ian Tonks said: "The announcement of five days of new strikes demonstrates the determination of our members to fight for their jobs and employment conditions and our adamant opposition to 'exporting' skilled UK jobs abroad.
"The UK management of Fujitsu is intransigent and refuses to engage with its dedicated and hard-working employees.
"Our members will continue their fight, and the fact that 20 days of strike action has or will be held is a mark of their strong resolution."