Mr Mellor qualified in dentistry in Liverpool (1978) and medicine in Cardiff (1991), his surgical training was in the West Midlands (Birmingham, Wolverhampton and Stoke on Trent). Mr Mellor has also worked in Holland, Hong Kong and the USA. In 1999 he was appointed as Consultant Oral and Maxillofacial Surgeon at Queen Alexandra Hospital, Portsmouth and St Mary's, Isle of Wight. He had previously been a Consultant in the RAF at Royal Hospital Haslar from 1996 to 1999.
Mr Mellor's special clinical interests include head and neck cancer, facial skin cancer, salivary gland disease, microvascular reconstructive surgery, laser surgery and cosmetic facial surgery.
He currently leads the Head and Neck Oncology service on the south coast and chairs the South West Cancer Intelligence Service head and neck group.