The High Court has ruled in favour of a father who took his daughter out of school to go on holiday.
Jon Platt refused to pay £120 for taking his six-year-old to Disney World Florida last year and because of her regular attendance, Isle of Wight magistrates ruled he had no case to answer.
But the council asked the High Court to rule on whether taking a seven-day absence amounts to regular attendance.
The ruling raises the prospect of similar challenges from parents of children in English state schools, for which tightened rules on authorised absences were introduced by the government in 2013.
A High Court ruling is due on whether taking your children out of school is a criminal offence, but what are the current rules?Read the full story ›
It comes after a father was fined £120 for taking his daughter on holiday during term time.Read the full story ›
Charity ChildLine said it received a higher number of calls in the run up to GCSE and A-Level results.Read the full story ›
Ministers have blamed one 'saboteur' marker for the leaked Sats test answers, in the latest row over school tests for young children.
ITV News' Social Affairs Editor Penny Marshall reports:
ITV News has spoken to schoolchildren about today's Sats test to find out what they made of it.
Their responses may surprise you:
The publisher of the leaked test has apologised and said it has launched an investigation.
The wrong paper was "temporarily uploaded on to our secure website", which has "no public access and is only available to our test markers", a Pearson spokesman said.
We apologise to schools, teachers, parents and pupils for this error at this sensitive time. We are conducting an investigation to make sure it cannot happen again. As part of this investigation we will seek to find out which individual passed this information into the public domain, in breach of their commitments to us and their fellow markers.
As soon as we were made aware the website in question was taken down. The appropriate papers are now available on the site to facilitate the marking process.
A small number of markers accessed the paper, although as contracted markers they are bound by confidentiality and have a duty not to share any papers.
We do not have any evidence that the content of the paper has been compromised and it is important that the test should go ahead, not least as it follows so much hard work by teachers and pupils.
The integrity of the Sats test has not been compromised by the leak, Education Minister Nick Gibb said.
An investigation has been launched to find the "rogue marker" who leaked the test paper to a journalist.
He told the Commons: "We have no evidence to suggest sensitive information entered the public domain before children took the test today."
The test was accidentally published on a secure site on Monday evening instead of Tuesday morning.
One of the 90 markers for the test logged on, downloaded the paper and tried to offer it to newspapers, a Department of Education source said.
He added: "Although this is a serious breach and I'm determined to get to the bottom of how this error occurred, it is clear that the actions of almost every marker involved have been correct and proper and the integrity of the test has not been compromised."
The shadow education secretary called for an emergency review of the primary assessment system in light of the leaked Sats papers.
Lucy Powell said: "The possibility that education ministers have compromised the Sats Key Stage Two spelling and grammar test coming, as it does, hot on the heels of their cancellation of the KS1 spelling and grammar test due to incompetence, calls into question the ability of ministers in the department to properly manage our education system.
"This news undermines the validity of the Sats spelling and grammar test children are sitting today and is a body blow to parent and teacher confidence in the primary assessment system."
The teaching union has called on the government to conduct an "open review" of the Sats test after it was leaked by a "rogue marker".
All the issues surrounding the arrangements and the content of the tests needs to be reviews, General Secretary of the NASUWT teaching union Chris Keates said.
A Sats test in spelling and grammar due to be taken by hundreds of thousands of primary school pupils in England was leaked by a "rogue marker".
Given the high stakes nature of the testing for teachers and school leaders, if the integrity of the tests cannot be guaranteed then it is absolutely clear that they cannot be used to judge the performance of schools.
The time has now come for the Government to commit to conducting an open review of all of the issues surrounding this year's Key Stage One and Two tests and assessment arrangements, including the content.