The Western Trust says it is investigating a data breach after a patient who had requested his medical records was given a file containing another persons records . Jonathon had attended Altnagelvin Hospital with a heart condition and as he was nt happy with his diagnosis he requested his medical records . He told the Shaun Doherty Show today of his shock that his file contained 70 pages of another persons medical records : ( audio file ) In a statement it said that there are many thousands of medical records used everyday and the Trust experiences very small numbers of data breaches annually . The trust says it is working to address the error with those involved and the service area concerned . ;