Teachers at Humza Yousaf’s former school in Glasgow have voted for strike action amid a dispute over pension entitlements.
A vote of staff at the independent Hutchesons’ Grammar School found 78 per cent backed the action, on a turnout of 86 per cent.
The Educational Institute of Scotland (EIS), the country’s largest teaching union, now plans to call its members at Hutchesons’ out on strike in the near future.
Both SNP leader and First Minister Mr Yousaf and Scottish Labour leader Anas Sarwar are former pupils of the school.
EIS general secretary Andrea Bradley said: “This is a very strong ballot result, which demonstrates the determination of EIS members at Hutchesons’ to stand up for their contractual terms and conditions in the face of attacks by an aggressive management regime.
