Daniel Lambert 1770-1809 Britain's first obese man. At the Newarke Houses Museum in Leicester, England, hangs a portrait of Britain's first obese man, painted in 1806. Daniel Lambert weighed 53st (335kg) and was considered a medical oddity. Too heavy to work, Lambert came up with an ingenious idea: he would charge people a shilling to see him. Lambert made a fortune, and his portrait shows him at the end of his life: affluent and respected – a celebrated son of Leicester.