An inquest in to the death of a woman who suffered massive brain damage when nurses dislodged vital breathing apparatus got under way this morning.

Velina Spence, 46, was being rolled by staff while the sheets of her bed were being changed in Northwick Park Hospital's Intensive Care Unit on September 10, last year.

She had been recovering from a 13-hour operation to remove a tumour from her jaw when pipes helping her to breathe sprang a leak.

She had just come out of theatre and was heavily sedated when her organs were starved of oxygen and the tragedy occurred.