Peter Garrard is a consultant neurologist at the Centre for Clinical Neuroscience at St George’s University Hospitals, London where he specialises in neurological disorders, particularly neurodegenerative dementia, cognitive disorders, progressive language disorders, early onset dementia and frontotemporal dementia.

Notable research subjects include the novelist Iris Murdoch, former Prime Minister Harold Wilson, and King George III. More recent research has used computer algorithms to demonstrate language changes associated with political power: changes were seen in the speeches of two British politicians who developed the ‘Hubris syndrome’. This recently-described personality disorder leads to dangerous overconfidence, isolation and misjudgement in certain leaders.