Fujitsu workers are continuing their strike today in a dispute over redundancies and pay.
The strike will run on the 8, 11, 14 and 15 of January after workers started the action on 18 December. It follows a November vote in which 75% of Unite union members voted to strike.
It is the first national strike in the UK IT sector and is hitting sites in Manchester, Bristol, Newcastle and London among others. Fujitsu employs around 11,500 people in the UK.
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%.
Peter Skyte, Unite national officer, said, "Whilst we remain ready and willing to talk at any time, Fujitsu remains a highly profitable company but has to date shown little willingness to seriously address the underlying issues of jobs, pay and pensions.
"Other IT companies are dealing with similar issues in a much more constructive way and the approach taken by Fujitsu treats its highly skilled workforce as a disposable commodity rather than its most important asset."