However, only 39 patients aged 65 and over would have to be treated with antibiotics for a chest infection to prevent a case of pneumonia.

BBC: NEWS | Health | Antibiotics 'unnecessarily used'

"In the case of Corporal Millington, the donor had a chest X-ray, broncoscopy and a careful inspection of the lungs once they were removed, " Watson told CNN.

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In one case, Ms Baldwin said, "the chest was moving".

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In the case of lung transplants, the donor will have a chest x-ray and broncoscopy, where an endoscope is used to examine lungs from the inside.

CNN: How organs are selected for transplant

He said because of the decomposition of the body the informed cause of death was unascertainable but taking into account the case as a whole, some kind of suffocation or chest compression was most likely.

BBC: Stuart Hazell leaves his partner's house on 8 August 2012