dr christopher valentine , 52 , was sacked from a sexual health clinic and hauled before the general medical council nine years ago for photographing half-naked male and female patients without consent .
his behaviour was branded ` inappropriate ' but he was not struck off and went to work at an nhs service for drug addicts and alcoholics .
however , the married doctor has been caught again after a nurse saw images of a semi-naked man on his ipod touch .