Sarah still feels sick to her stomach.

For the past 10 months, the 35-year-old mother has closely followed events surrounding LL Camps, the children's camp formerly run by directors Ben Lewis and Tal Landsman.

Sarah, who asked not to give her surname, had sent her five-year-old son Josh to the camp over the past two years.

She recalls reading about its closure on the JC website last August after it emerged that Lewis had photos of naked three- and four-year-old girls stored on his phone.

She was shopping for Friday night dinner in her local kosher butcher in Radlett, Hertfordshire, when she saw the news.

"The colour just drained from my face," she says. "I wanted to throw up, it was a feeling of physical sickness, of horror, of the worst kind of betrayal. You trust them with your children, who are your life. I also felt guilt, because I might have exposed my child to something. I've coined a new illness, I call it: LL Sick."

She said the feeling of anxiety she experienced then returned last week as the trial of the camp's co-founders took place at St Albans Crown Court.

"It came back with a vengeance," she said. "It sends me crazy. I get obsessive, I have anxiety. I've called up Ofsted and newspapers for information about the case - and I am not normally that kind of person.

"I just still feel so violated. I don't want to be someone who now doesn't let people touch my child. It's hard."

Sarah is a member of a Whatsapp group called LL Camp Mummies, made up of concerned parents who sent their children to the camp.

She said she decided it was the right place for her son after the camp was promoted at his nursery in Borehamwood, Hertfordshire. "They came and gave raffle prizes at Parent Teacher Association meetings," she said.

Along with other parents at the school, she sent her child more than 20 times to the camp in Bushey during Pesach and summer holidays. Up to 90 per cent of campers were from the Jewish community. "Ben and Tal relied heavily on word-of-mouth. If you got a list of kids into the camp, they would give you 10 per cent off," Sarah said.

Parents were charged between £25-£35 a day to send a child to camp.

She described the camp, which attracted up to 150 children aged three to 14 a day, as: "very American, with big crowds and lots of music - like the stuff from High School Musical. You felt like you were walking into a theme park. There were young staff members in bright T-shirts."

Activities ranged from "arts and crafts, to swimming or walks in the nearby woods". Kosher sweets were available to the children.

Sarah, who has worked within Jewish communal organisations for 15 years, said that when the camp closed, rumours started to circulate. "At first, we thought that a child had walked out of the camp. Some people said that LL Camps had gone bankrupt. People just did not know what was happening."

Parents had to find alternative childcare for their children, with some dipping into their savings.

While some received refunds, others told the JC that they had "written off" the money they were owed.

One father said he had managed to get back the money for sending his two sons to the camp after "badgering" its organisers.

Another said he had invited Lewis and Mr Landsman to his home to discuss the enrolment of his three-year-old daughter to the LL Primary School they were planning.

He said: "The school sounded brilliant - very high-tech."