A Birmingham primary school has been stripped of its English exam results for 11-year-olds as cheating allegations marred this year's national SAT tests.
The action means William Cowper Primary School in Newtown will effectively receive zero attainment for literacy exams taken by pupils earlier this year.
It was one of five primaries in England where official inquiries uncovered malpractice in the national curriculum SAT tests taken by 11-year-olds.
The four others saw their results wiped out in all three subjects of English, maths and science. They were St Charles' Catholic Primary School in Liverpool; Brockswood Primary School in Hemel Hempstead, Hertfordshire; St Bernadette's Roman Catholic Primary School in St Albans and Springfield Community Primary in Hackney, north London.
A teaching union last night claimed it highlighted the pressure schools were under.
A total of 24 year six pupils at William Cowper had their test results annulled by the National Assessment Agency following an investigation. The watchdog said it was not satisfied by the way pupils were prepared for the writing test.
The school last night refused to comment.
However, Birmingham City Council confirmed it had been found to have acted inappropriately following an investigation by the National Assessment Agency.
"The NAA was not satisfied with the way in which pupils in one of the school's literacy groups were prepared for the writing test and a decision was made by the NAA National
Curriculum Tests Maladministration Committee to annul the writing test results for 24 pupils at the school," it said.
"As the writing test results contribute to the overall English results, the decision means that no English results can be reported for these children in the 2007 key stage two achievement and attainment tables."
The controversy followed warnings from academics, children's charities and teachers that highly pressurised national tests have come to dominate primary education.
Lynn Collins, Midland regional secretary of the National Union of Teachers, said: "It puts them under too much pressure and causes a situation like this where people step out of line.
"I think it is more an indication of the failing of the testing regime rather than individuals and it shows league tables are beyond repair."
NAHT general secretary Mick Brookes said incidents involving malpractice reflected "the extreme end" of the pressure schools face to get results.
However, Schools Minister Andrew Adonis said it was "unacceptable and unnecessary" for any school or teacher to cheat.
He said: "Clearly, five out of over 13,000 primary schools is not at all representative of what is happening in our schools and cannot be seen as any indication of national tests causing increased pressure on teachers."
The national SAT tests taken by 11-year-olds this year show 80 per cent hit the Government's level four target in English, 77 per cent in maths and 88 per cent in science.
For Birmingham the figures were 76 per cent, 73 per cent and 84 per cent respectively. It meant the local authority dropped five places in the national ranking to 131.
Three-quarters of Midland local authorities slumped in the league table. Solihull, which last year was ranked second in the country, fell to seventh out of the 150 authorities, though it still remained top of the table for the region.
Warwickshire went down six places to 34 and Shropshire fell 25 places to 46.
Walsall retained its 105th position while only Staffordshire, Sandwell and Stoke-on-Trent improved to be placed 51, 134 and 140 respectively.
Councillor Les Lawrence (Con Northfield), Birmingham's cabinet member for children, young people and families, defended the authority's performance.
He said: "Birmingham's performance in English is one per cent above the average for the core cities and in line with the average for our statistical neighbours.
"The performance is in line with the core city and statistical neighbour averages in both mathematics and science."