in Sion v Hampstead HA (1994) 5 Med LR 170 the claimant failed in similar circumstances. In both North Glamorgan and Sion the breach of duty was medical negligence. The distinguishing feature in Sion, however, was that the psychiatric condition developed after the claimant saw the victim in intensive care over a longer period and gradually came to the realisation that medical negligence had caused the injuries. Unlike in North Glamorgan this was not a sudden reaction to a horrifying event. Peter Gibson LF commented in Sion:

A psychiatric illness caused not by a sudden shock but by an accumulation of more gradual assaults on the nervous system over a period of time is not enough.