Henry Thomas Marsh CBE FRCS (born 5 March 1950) is a British neurosurgeon and author, a pioneer of awake craniotomy techniques and of neurosurgical work in Ukraine.

[2] They played a leading role in the creation of the human rights organisation Amnesty International, the brainchild of the lawyer and activist Peter Benenson.

Fragile mental health left Marsh considering suicide, and he took a year out, spending time as a voluntary patient, as well as working as a porter in a hospital.

[4] Until 2015, Marsh was the senior consultant neurosurgeon at the Atkinson Morley Wing at St George's Hospital, south London, one of the country's largest specialist brain surgery units.

He specialised in operating on the brain under local anaesthetic and was the subject of a major BBC documentary Your Life in Their Hands[6] in 2004, which won the Royal Television Society Gold Medal.

[7] He has a particular interest in the influence of hospital buildings and design on patient outcomes and staff morale; he has broadcast and lectured widely on this subject.

[citation needed] In 2023 Marsh was awarded the Clement Price Thomas medal by the Royal College of Surgeons (England).

[citation needed] Henry Marsh is married to the social anthropologist Kate Fox, author of the best-selling "Watching the English", and spends his spare time making furniture and keeping bees.