Thomas Alastair Sutherland Ogilvie ('Taso') Mathieson (25 July 1908, Glasgow – 12 October 1991, Vichy),^[1][2] stylised as T.A.S.O. Mathieson and sometimes referred to as Donald Mathieson, was a British racing driver and author of automotive history books.

'Taso' was the son of Thomas Ogilvie Mathieson. His family owned the Scottish hand tool manufacturing company Alexander Mathieson & Sons.

'Taso' Mathieson started racing in 1930, when he entered a race at Brooklands restricted to Lagondas.^[3] He established his first victory during an Easter Bank-Holiday BARC Open Meeting on 28 March 1932, driving a supercharged Officine Meccaniche. Over the next two years, he won three races in his Bugatti and broke the lap record for 2-litre cars at Snaefell Mountain Course on the Isle of Man, with an average speed of 72.15 mph (116.11 km/h).^[2]

Because of health problems, Mathieson was unable to enter any races from 1934 to 1937, so his Bugatti was driven a few times by Chris Staniland. In 1938 and 1939 he entered the 24 Hours of Le Mans, but both times retired before the finish.^[2][4]

Mathieson was one of the first, if not the first, Briton to race again in Continental Europe after World War II, racing an ex-Henry Birkin 3-litre Maserati in 1946.^[2] On 30 May, he raced in the Coupe de la Résistance and retired with an oil leak.^[5] He entered the Grand Prix des Frontières on 9 June, but instead raced at the René le Bègue Cup held on the same day, finishing fifth.^[6][7] On 16 June, he attended the Belgian Grand Prix in Brussels, but did not start.^[8] He placed sixth in the Roussillon Grand Prix on 30 June,^[9] and on 28 July he raced in the Nantes Grand Prix, retiring with engine troubles.^[10]

Mathieson entered an ERA E-Type with Leslie Johnson as driver, for 1949 Richmond Trophy,^[11] Jersey Road Race^[12] and British Empire Trophy, as well as the 1950 British Grand Prix.^[13] Some sources attribute these as official ERA entries because Johnson had purchased the car manufacturer three years before.^[14] Mathieson bought a 2-litre Frazer Nash Le Mans in which he scored a class victory in the 1950 24 Hours of Le Mans together with Richard "Dickie" Stoop.

He continued racing until 1955, mostly entering Grands Prix in France. When he was injured in a traffic or racing accident, he was forced to retire.^[15] After 25 years of racing, Mathieson concentrated on his writing and his collection of photographs, together with his wife Mila Parély, a French actress he had married in 1947. He wrote various authoritative books, including Grand Prix Racing 1906-1914, and wrote several articles in the French magazine Le Fanauto in 1979 and 1980.

• Mathieson was the team owner, not a driver.

† Pierre Maréchal was killed in an accident.

Complete 24 Hours of Le Mans results

More information Year, Team ...

Year	Team	Co-Drivers	Car	Class	Laps	Pos.	Class Pos.
1938	Norbert Jean Mahé	Freddy Clifford	Talbot T150C	5.0	159	DNF (Fire)[2]
1939	Luigi Chinetti	Luigi Chinetti	Talbot T26	5.0	154	DNF (Contact)
1949	Mrs. R.P. Hichens (private entrant)	Pierre Marechal	Aston Martin DB2	S2.0	192	DNF (Accident)
1950	H.J. Aldington (private entrant)	Richard "Dickie" Stoop	Frazer Nash Milla Miglia	S2.0	235	9th	1st

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Complete Targa Florio results

More information Year, Team ...

Year	Team	Co-Drivers	Car	Class	Laps	Pos.	Class Pos.
1951	T.A.S.O. Mathieson	Jacques Pollet	Frazer Nash Le Mans Replica	S+1.1	4	DNF (Engine)
1952	???	???	Ferrari 195 S Barchetta	S+2.0	8	6th	1st

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• Mathieson, T.A.S.O. (1963). A Pictorial Survey of Racing Cars Between the Years 1919 and 1939. Tarporley, GB: Motor Racing Publications, Ltd.
• Mathieson, T.A.S.O. (1965). Grand Prix Racing 1906-1914: A History of the Grand Prix De L'automobile Club De France. Stockholm, SE: Connaisseur Automobile A.B.

• T.A.S.O. Mathieson at racingsportscars.com.