Campbell was born in Chislehurst, Kent. on 11 March 1885, the only son of William Campbell, a Hatton Garden diamond seller. He attended the independent Uppingham School. In Germany, learning the diamond trade, he gained an interest in motorbikes and races. Returning to Britain, he worked for two years at Lloyd's of London for no pay, then for another year at £1 a week. Between 1906 and 1908, he won all three London to Lands End Trials motorcycle races. In 1910 he began racing cars at Brooklands. He christened his car Blue Bird, painting it blue, after seeing the play The Blue Bird by Maurice Maeterlinck at the Haymarket Theatre. Campbell married Marjorie Dagmar Knott in 1913 but divorced two years later. Campbell then married Dorothy Evelyn Whittall in 1920 and their son Donald was born in 1921, and their daughter, Jean, in 1923. They divorced in 1940. Campbell married Betty Nicory in 1945 in Chelsea.
Military service
At the outbreak of World War I, Campbell initially enlisted as a motorcycle dispatch rider and fought at the Battle of Mons in August 1914. Shortly afterwards he was commissioned as a second lieutenant in the 5th Battalion, Queen's Own, a Territorial Force unit, on 2 September 1914. He was soon drafted into the Royal Flying Corps, where he served as a ferry pilot, as his instructors believed he was too clumsy to make the grade as a fighter pilot. During the late 1930s he commanded the provost company of the 56th Division of the Territorial Army. From 1940 to 1942 he commanded the military police contingent of the Coats Mission tasked with evacuating King George VI, Queen Elizabeth and their immediate family from London in the event of German invasion. On 23 January 1943 he was transferred from the Corps of Military Police to the General List. On 16 December 1945, having attained the age limit of 60, Campbell relinquished his commission and was granted the honorary rank of major.
Campbell died after a series of strokes in 1948 in Reigate, Surrey, aged 63 years. He was one of the few land speed record holders of his era to die of natural causes, as so many had died in crashes. His versatile racing on different vehicles made him internationally famous.
Honours and awards
In recognition of his service during World War I, Campbell was appointed a Member of the Military Division of the Order of the British Empire on 3 June 1919.
In 1931 on his return from Daytona where he set a land speed record of, he was given a civic welcome and a Mansion House banquet in London, and was knighted at Buckingham Palace by King George V on 21 February 1931.