A secondary school which isolated as many as 70 pupils on the first day of term has now been accused of forcing a 12-year-old to 'bite off' her fake nails before a class.

Denbigh High School, in north Wales, refused to let a large number of children attend lessons after they arrived wearing the wrong uniform.

Staff at the school claimed pupils were in breach of the new uniform policy and were wearing trousers which were 'too tight'.

Parents said that when pupils arrived for the first day of school, those considered to have broken the rules were 'isolated'.

Pamela Williams, 48, from Denbigh, said her two daughters, aged 12 and 15, both go to the school and claims her daughter was told to 'bite off' her false nails.

As many as 70 pupils were put in isolation for wearing trousers which were 'too tight' and other uniform breaches at Denbigh High School in north Wales (pictured)

Tracey Webster, 40, (middle) holds up the trousers her 12-year-old daughter wore to school

Speaking today, she said: 'One of the teachers made my 12-year-old bite off her false nails in the class.

'She was really upset because they were a birthday present and it's ruined her nails underneath.

'It's disgusting what they're doing to the kids, you should see the teachers - half of them are caked in make-up.

'It's the headteacher who's doing this, he's got the school where it needs to be with exam results but this is too far.

'Another girl was put in isolation because she had white socks - what does it matter what colour her socks are?'

Tracey Webster, whose 12-year-old daughter attends the school, said: 'I am disgusted with the school.

'My daughter was so looking forward to school this term, she was looking forward to a fresh start after having some problems at school last year.

'She was told first thing that her trousers were too tight and that she wouldn't be able to attend classes.

'She doesn't want to wear baggy trousers, and in any case, how does the fit of the trousers affect a child's learning?

'Her trousers are nice - they're presentable - and now I've had to get a friend to take me to buy her a baggy pair that she will probably hate.

'She came home in floods of tears on her first day, she was so distressed. I think it's disgusting that children lost a day's education because of this.'

Ms Webster, 40, added: 'It's really expensive for parents. We have wasted money when we can't afford to. I have seven children, and this is not fair.

'I appreciate that there has to be a certain uniform standard, but trousers that are too tight? I think it's pathetic.'

One woman, who did not wish to be named but whose granddaughter attends the school, said: 'I received a phone call from my granddaughter complaining that she was being put in isolation because her trousers didn't comply with school rules.

'She said that around 70 pupils were also there, both boys and girls, because they had the wrong style trousers or skirts, or the wrong fit.

'I understand that uniforms are important but the reasons seemed petty. I am up in arms that they were taken out of their lessons and that they wasted a day.

'Surely trousers that are too tight shouldn't warrant a child losing a day's education?

'My granddaughter is angry and upset. Those children learnt nothing yesterday; what a waste.

'We now apparently have until next Monday to get different trousers for her so we will go later to buy her new ones.

'I don't know why they couldn't just have sent a letter instead of excluding these children from lessons.'

Ms Webster's daughter (right) was told she was not allowed to attend classes because her trousers were too tight and students at the school were offered trousers from lost property to wear instead (left)

Simeon Molloy, headteacher at Denbigh High School, said: 'We believe that standards across the board, including uniform, contribute to a positive learning environment.

'At the end of the last school year we held several school assemblies that outlined our school uniform policy.

'We followed this up by telephoning parents and sending out letters with photographs and information on the style of trousers and length of skirts.

'On Monday, September 5, the first day of the school term, there were a number pupils whose uniforms did not meet the required standard.

'The main issue involved the wearing of inappropriate trousers, skirts and footwear.

'Those pupils with incorrect uniform had access to their learning through notebooks in our learning suite, separate from their normal lessons. Several pupils were able to get the correct uniform during course of the day and returned to their classes.

Simeon Molloy, headteacher at Denbigh High School, said: 'We believe that standards across the board, including uniform, contribute to a positive learning environment'

'We have spoken with every parent of every student involved in this matter to explain individual issues with each pupil's uniform. We will continue to uphold our high expectations.'

Amy Williams, 37, from Denbigh, said: 'Some of it is over the top but you're told what the uniform is. Children should go to school looking smart and presentable.

'But I do think that the staff should have a uniform too though, they should have to wear a t-shirt with the school badge on or something.'

Many parents and relatives used social media to speak out against what had happened.

Nikkileigh Evans, whose brother attends Denbigh High, said: 'I can't believe that children were put in the isolation room for wearing the wrong trousers/skirts.

'They are there to learn not to get judged on what they wear!

'A lot of the children that got sent to the isolation room were wearing the same sort of thing as they did last year. Isn't that contradicting themselves?

'And the new kids to the school must have been nervous enough without the school ruining their first day there.'

Another woman who did not wish to be named, said: 'I have nieces at Denbigh High School. I think it's so cruel and unnecessary what the school have done.