AS IT HAPPENED
- News updates on England teachers' strike
- Pictures, analysis and reaction from 17 Oct
Good morning and welcome to our live coverage of today's teachers' strike.
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Thousands of schools are expected to be closed across much of England as teachers strike over pay, pensions and jobs.
Teachers in London, Cumbria, the South East, North East and South West are taking part in the one-day strike.
As thousands of teachers in several parts of England go on strike over pay, pensions and conditions, BBC Education looks at the backdrop to the industrial dispute.
In Cornwall, 107 schools have announced they will either be closed or partially closed to pupils as a result of the industrial action, Cornwall Council says.
More than 110 schools will be affected in Devon by closures or partial closures. The Devon County Council area will see 43 affected, the Plymouth unitary area has 52 schools and there's another 19 in the Torbay unitary council area.
Today's strike is the third in a series of regional walk-outs in protest at changes to pay, pensions and workloads.
The first strike was at the end of June in the north-west of England. During the second day of action on 1 October, more than 2,500 schools were closed or partially closed in the east of England, the Midlands, Yorkshire and the Humber.
Nineteen out of 33 London boroughs have provided information to BBC London 94.9 about the number of schools affected so far.
Of those, about 400 schools are completely closed and 450 partially closed.
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In Hampshire, more than 100 schools are closed or partially closed.
At least 40 schools are shut or partially shut in Portsmouth, with 18 open.
Southampton has 45 schools closed or partially closed with about 30 open and the Isle of Wight has 26 shut and 26 open.
The NUT's deputy general secretary Kevin Courtney acknowledged many families would be inconvenienced by the strike.
He told BBC Radio 5 Live: "We sincerely want to apologise to parents both for the disruption to their children's education and for the disruption of parents' working lives."