What Bolitho decided
Bolitho v City and Hackney Health Authority [1997] qualified Bolam. Lord Browne-Wilkinson held that a body of medical opinion can only shield a clinician if it is capable of withstanding logical analysis. In the rare case where professional opinion cannot be logically supported, a court is entitled to conclude that it is not, in fact, reasonable or responsible, and to reject it.
The facts
A young child suffered catastrophic injury after respiratory failure. The case turned on what a doctor should have done had she attended, and whether intubation would have prevented the harm. The court accepted expert evidence that not intubating could be a responsible position, but only after testing whether that view held together logically. It did, and the claim failed, but the principle was established.
Why it matters now
Bolitho did not overturn Bolam. It closed a loophole. Before Bolitho, pointing to a group of doctors who would have done the same was close to unanswerable. After Bolitho, peer support is necessary but not always sufficient. The reasoning behind the practice has to stand up, which means it has to exist in a form that can be examined.
What it means for your clinic
Defensible reasoning that lives only in your head is, for legal purposes, reasoning that did not happen. Bolitho is a standing instruction to record the why: why this treatment, why this dose, why the alternative was set aside. A record that shows a logical, patient-specific rationale is Bolitho-proof in a way that a tick-box never is. Read alongside Montgomery, the message is consistent: the law rewards a documented, reasoned process.
Where this sits in the story
Consent and negligence law did not arrive fully formed. It climbed, case by case. You can watch the whole arc, and see what each judgment added to the burden your records carry, in the interactive timeline. The related cases are linked below.
Watch the standard rise: 1957 to today →
Related: Bolam · Montgomery · McCulloch · Chester v Afshar