Exam appeals are set to be "severely delayed" when staff from the Scottish Qualification Authority (SQA) go on strike next month over pay.
Unite the union said 86.7 per cent of its members voted for industrial action to take place on September 8, 15 and 16, while 85.9 per cent also said they would take action short of a strike.
An overtime ban and a ban on accrual of time off in lieu will be in effect from September 8 to November 30.