Andrew Hutchinson was reported to the hospital trust where he worked for indecent behaviour five years before being convicted of sexual offences . Bosses at a hospital where a male nurse sexually assaulted patients were warned of his predatory behaviour five years before he was convicted of 23 different offences against patients. Andrew Hutchinson raped two patients while they were under general anaesthetic and assaulted others at John Radcliffe Hospital Oxford where he worked in the A&E department between 2011 and 2013. The 29-year-old was convicted of 23 separate charges last month including making indecent images of children, outraging public decency and voyeurism. He was taken into custody at Oxford Crown Court and is due to be sentenced next week. It has since emerged that an earlier complaint about the nurse was made to bosses at Oxford University Hospitals Trust. In 2009 a student nurse reported Hutchinson as having taken inappropriate photographs at the hospital. But the hospital didn't report it to police as they said there was not sufficient evidence to suggest whether there was grounds for a complaint. Instead bosses only mentioned it to authorities after being told of more serious allegations Hutchinson was facing. After his conviction, Oxford University Hospitals Trust said it was first made aware of any alleged sexual misconduct when contacted by police in 2014. In a statement spokesman Susan Brown said: 'November 2014 Thames Valley Police requested a meeting with the trust and at the meeting informed Oxford University Hospitals about the images they had found and that they believed some were taken on trust property. 'This is the first time that the Oxford University Hospitals were aware of the serious allegations of sexual assault, voyeurism and rape that took place in our hospital.' When contacted by MailOnline this afternoon Ms Brown said the 'important' thing was that the Trust reported the 2009 complaint after being made aware of the more serious charges. Hutchinson was reported to police separately after being caught filming women as they changed their clothes at the White Horse Leisure Centre in Abingdon. After searching his home police discovered photographs and video footage of him abusing women in the hospital. Some of his victims were unconscious at the time. CCTV footage from the leisure centre where Hutchinson preyed on women as they changed shows the nurse walking through its lobby . Staff at Oxford University Hospitals chose not to investigate the complaint made against Hutchinson while he was working at John Radcliffe Hospital (above) In 2010 Oliver Balicao, another male nurse at the hospital, was jailed for raping two female patients . One of his victims self-harmed after learning what had happened to her while she was under general anaesthetic. In 2010 Oliver Balicao, another male nurse at the hospital, was jailed for raping two female patients. As a result of the attacks , unconscious patients are now treated in an open area, a hospital source revealed. During a trial at Oxford Crown Court it was heard how Hutchinson had preyed on victims aged between 10 and 35. The nurse stole one of the hospital's cameras to be able to film up the skirt of a woman as she visited her sick friend and had become 'addicted' to spying on women and children, it was claimed. Once arrested police discovered more than 1,700 indecent images on his computer and phone. He will be sentenced at Oxford Crown Court on April 27.
Andrew Hutchinson raped two women who were under general anaesthetic .
The 29-year-old was working as a nurse at John Radcliffe Hospital Oxford .
Admitted 23 sexual offences last month and is facing jail when sentenced .
In 2009 a student nurse complained he had inappropriate photoghraphs .
The hospital trust did not think there was sufficient evidence to tell police .