Education chiefs are refusing to say why a Burnley primary school had its Key Stage 2 exam results annulled.
Lowerhouse Junior School, which recently went from being in special measures to a good rated school in 12 months, has been accused of maladministration by the Government’s Standards and Testing Agency.
But Lancashire County Council, which administers the school, would not reveal what the issue was or who was responsible.
A Standards and Testing Agency spokesman said: “Any instances of maladministration that lead to the annulment or amendment of test results are completely unacceptable.
“Following an investigation at Burnley Lowerhouse Junior Primary, the decision was made to annul the Key Stage 2 results.
“As a result children will not receive overall levels for maths, reading and grammar, punctuation and spelling.”
Headteacher Claire Holgate, who came to the school in May last year, oversaw a rapid transformation in the school’s fortunes following a damning Ofsted report in 2013.
Inspectors said in their latest report, in June, that the headteacher had inspired and energised staff to be committed to school improvement.
Mrs Holgate has issued a statement following the Standards and Testing Agency’s decision.
She said: “Unfortunately the Standards and Testing Agency have annulled our 2014 SATs results due to what they describe as maladministration.
“We have thoroughly investigated the issue with the support of the Standards and Testing Agency and the county council, and taken steps to tighten up procedures so this could not happen again.
“We were able to supply verified teacher assessments for all our Year 6 pupils and I am pleased to say they are all now settled in secondary school. Their parents have been informed.”