Clampers who targeted a bus carrying special needs children have come under fire from an angry mother who says the ordeal caused her daughter to have epileptic seizures.

Heather Holland is demanding an apology from the Carstoppers firm which clamped a minibus carrying six children with learning difficulties on a school trip to a beauty spot.

Teachers from Haycliffe Special Needs School in Great Horton were forced to pay £50 to release the wheel clamp from a car park in Haworth.

The bus was clamped for parking across two bays in the car park in Changegate, by Carstoppers, which monitors the site for its owner Ted Evans.

Mrs Holland, whose daughter Amy was among the party of six children who were stuck on the clamped bus, is writing to the firm to voice her anger at what happened.

She told the Telegraph & Argus that her daughter was hysterical when she returned home on Friday.

Amy is 14 but has the mental age of a three-year-old. She suffers from a rare disorder of Chromosome 15 which means she has severe learning difficulties and behavioural problems and requires 24 hour care. She also has epilepsy and has regular seizures.

Mrs Holland, of Weston Avenue, Queensbury, said: "She came back on Friday afternoon and it took me and the bus driver and two escorts to get her off the bus and I couldn't understand why she was so bad.

"When I found out what had happened I was seething and

I still am.

"The children in this class are the most demanding at the school and trips out for them are very rare. Any disruption to their environment upsets them, everything has to be explained so I was really angry that these children were made to wait while the teachers paid £50, they were just lucky they had enough money to pay the fine."

She added: "To clamp a bus with children with disabilities is the lowest of the low. I can't find the words to express my disgust."

However the car park's owner Ted Evans described the criticism as "unfair".

He said: "If the driver has followed the signs which say coaches to the right then this wouldn't have happened.

"Any car park would penalise people for parking across two bays and there was no badge on the vehicle to say these children were special. The operative had no way of knowing who they were clamping.

"It is unfair to make statements of that sort. They put themselves in that position, not the clamper, he was just doing his job. They should not have parked across two bays."

Teacher Julian Darby told the Telegraph & Argus earlier this week they used two spaces to allow the children room to get out of the bus safely without injuring themselves or damaging property.

However when they returned to the vehicle ten minutes later they found it had been clamped and Carstoppers staff refused to remove it. Now the school is also writing to Carstoppers

to urge them to more lenient in future.

Two years ago Carstoppers won the Dick Turpin Award, a competition run by the RAC to get motorists to nominate their least favourite clamper.