Workers at Fujitsu will go on strike for five more days over pay freezes, job cuts and the closure of a pension scheme.
The workers will strike tomorrow (22 January), when 454 will not work, according to the Register.
Four more strikes will be held throughout January and February.
Union members at Fujitsu had previously gone on strike on 8, 11, 14 and 15 of January after they started the action on 18 December. In November, 75% of Unite union members voted to strike, which was the first national strike in the UK IT sector.
Workers are angry about plans for 1,000 redundancies in the UK, a pay freeze imposed last year and plans to close the final-salary pension scheme. Unite says the total pay package of each employee has been typically affected by around 20%.