The ex-Smiths frontman has suffered a number of illnesses including a bleeding ulcer, Barrett's oesophagus and double pneumonia.

BBC: Morrissey

Testing the equipment in six patients known to have Barrett's oesophagus and seven healthy volunteers, the researchers said the images clearly showed the cellular changes that occur in those with the condition.

BBC: Scanner

In recent months the animal rights activist, who made his return to the stage last month at a show at the Staples Center in Los Angeles, has also suffered from a throat condition, Barrett's oesophagus, and anaemia.

BBC: Morrissey