(09/11/11) Thousands of head teachers in England and Wales have voted in favour of strike action over changes to pensions.
Members of the National Association of Head Teachers (NAHT) could now join thousands of other public sector workers on strike on 30 November.
But the NAHT general secretary said he would be "delighted" if they did not have to go ahead with the action.
The strike, also supported by teachers and support staff, is likely to see thousands of schools closed.
The teaching profession is angered by planned government changes to the teachers' pension scheme (TPS) which, it says, will mean teachers working longer, paying more and receiving less when they retire.
NAHT members hold leadership positions in most special schools, 85% of primary schools and more than 40% of secondary schools in England, Wales and Northern Ireland, meaning disruption would be widespread.
Pupils' learning will be disrupted and working parents will be inconvenienced as they make arrangements for childcare on that Wednesday.
Ballot turnout
Turnout for the ballot was 53.6%, with 75.8% in favour of strike action, the NAHT said.
It is the first time the NAHT has voted in favour of such action in its 114-year history.
(Article by Katherine Sellgren BBC news education reporter)