One in seven school leaders may have been denied the chance to vote in the NAHT’s strike ballot because of disruption caused by postal strikes, internal union data seen by Schools Week suggests.
The union fell short of the mandatory 50 per cent turnout threshold in its first national ballot over pay in its 125-year history.
The union announced on Monday that it is considering re-balloting its 25,500 eligible members.
The NASUWT teaching union is also mulling another vote after failing to meet the threshold for legal action.