The mother of a 14-year-old boy who was falsely accused of rape by a fellow pupil has spoken of her anger after her innocent son was held for five months with “murderers and gang members”.

The trial collapsed after a single day in court as it emerged that the girl, 14, could have lied about being raped to hide the fact she had tried to skip school.

The boy’s mother told the Wandsworth Guardian she was furious that the girl would get off “scot-free” while her son had to spend months on remand in a secure unit, miles from home, while waiting to be tried.

The schoolgirl from Putney claimed she had been raped by two boys, aged 13 and 14, at her home.

She had claimed the boys came to her house on October 16 and threatened to take her hostage, before taking it in turns to rape her.

However, the case collapsed at Inner London Crown Court last week because of conflicting evidence.

None of the teenagers can be identified for legal reasons.

The girl is unlikely to face any criminal charges for wasting police time because officials fear it could prevent other rape victims from coming forward.

The teenage boy’s mother said: “My son was banged up in a secure unit with murderers and gang members miles from home all on this girl’s say so, which turned out to be a load of rubbish.

“The whole story was lies right from the beginning and I can’t believe it went as far as it did.

“Now nothing will even happen to her as the Crown Prosecution Service has said it won’t prosecute her for wasting police time as it might stop real rape victims coming forward.

“I know measures need to be in place for real rape victims, but this shouldn’t have happened to two young boys.

“Now they have the stigma of all their friends knowing what they were accused of.

“No support has been given to them even though the case has been dropped. We’ve had no apology from the police and she gets off scot-free. It’s just wrong.”

The boys, both from Putney, always denied their involvement in the alleged rape and insisted the girl let them in to her house that day as they were all going to “bunk off ” school together.

A police spokeswoman said: “We are not in a position to comment as this may have a negative impact on victims coming forward.”