The disgraced singer, from Pontypridd, was sentenced to 29 years in jail last December for his offences, including an attempt to rape a baby.
It has been reported that three court judges sitting in Cardiff will review Watkins’ application alongside an application submitted by a woman jailed alongside Watkins for similar offences. The woman, who is seeking a reduction in her 17-year sentence, is the mother of a baby girl whom Watkins abused.
Prior to attending court Watkins, 37, denied all charges against him when arrested in December 2012 before admitting to charges when the case went to court.
Watkins admitted to three counts of sexual assault involving children, conspiring to rape a baby, seven counts of taking, making or possessing indecent images of children and possession of one extreme pornographic image involving a sex act on an animal; he pleaded not guilty to rape.
The women working alongside Watkins, who were sentenced at the same time and known only as A and B, were mothers of two of Watkins’ victims. They were jailed for 14 and 17 years.
Sentencing of Watkins comes in light of multiple other well-known figures charged with similar child sex offences. An inquiry was launched in May by the Independent Police Complaints Commission to see if celebrity status prevented him being brought to justice sooner.
Several police officers have already been implicated for gross misconduct on how information was handled in three different forces; three officers from South Yorkshire Police, two from Bedforshire Police and two from South Wales Police are all under investigation following the inquest.