Headteachers in England and Wales will be balloted for strike action for the first time in a major escalation of unrest over pay.
NAHT chief Paul Whiteman said he'd "never heard more anger and despair" from members as he confirmed the union would conduct a formal ballot over pay and funding for the first time in its 125-year history.
School leaders "cannot continue to run their schools in the current circumstances", he told the TUC's annual conference in Brighton today.