The issue of disclosure of evidence has been at the centre of a series of sex offence trials which have collapsed in recent months.
More than 900 criminal cases were dropped last year due to a failure by police or prosecutors to disclose evidence.
The series of failures led former Lord Chief Justice, Igor Judge, to warn that juries may start to think they have not been shown all the evidence, and victims to not come forward.
Oliver Mears (left) and Isaac Itiary (right) both had sex cases against them dropped when evidence emerged at the eleventh hour
In December, Isaac Itiary was released from prison after it emerged his alleged victim posed as a 19-year-old woman and lied about her age.
Police officers had texts which showed the girl was lying about her age but only released them after he had spent four months in custody awaiting his trial.
Earlier this month, the case against Samson Makele, 28, was halted after his defence team unearthed vital photographs from his mobile phone which had not been made available.
Mr Makele was accused of raping a woman after they met at Notting Hill Carnival in 2016 but he always claimed the sex was consensual.
His case, which was due to begin next month, was thrown out after more than a dozen photographs were found which showed the pair naked and cuddling in bed.
Also this month, Oxford student Oliver Mears, 19, spent two years on bail accused of raping and indecently assaulting a woman in July 2015.
But the CPS decided to offer no evidence against him on the basis of fresh evidence, including a diary that supported his case, which was passed to the CPS just a week earlier.