If the accused is a young person under the Youth Criminal Justice Act, then s/he can have a "Bail De Nova". This means that a Judge of the Youth Court will hold a new bail hearing.
If the young person is still detained, after the bail de novo, then s/he can bring an application for bail review to the next higher court. Transcripts of earlier hearings are required. which can be slow and costly.
A substantial change in circumstances of the accused, an error in law by the lower court, or the expiry of a mandatory review period, is required for any bail review.