Frederick Charles Stewart

Business and public initiatives Frederick became a founding director of the family-owned group of Thermotank companies with offices in Glasgow (its head office and main manufacturing base), London, South Africa and Canada. During World War I, he served with the 9th Argyll and Sutherland Highlanders, from which he retired with the rank of colonel in 1921. He continued his links with the Territorial Army. After Alexander's death in 1933, Frederick became chairman of the group.

Frederick Stewart's first class organising ability and foresight in long-term planning was recognised by the commercial and industrial world. He was chairman of the North British Locomotive Company, Ltd., and of Kelvin Bottomley and Baird, Ltd., deputy chairman of Brown Brothers and Co. Ltd., Edinburgh, and a director of William Baird and Co. Ltd. He was also a director of the Clydesdale Bank, Eagle Star Insurance, Bruas-Perak Rubber Estates, Clyde Confections Ltd, the three Caledonian Trust Companies, Scottish Industrial Estates Ltd and Lanarkshire Industrial Estates Ltd.

In public service he became a member of the Clyde Navigation Trust, a director of the Glasgow Chamber of Commerce, and of the Merchants House and the Trades House of Glasgow. He served on the Glasgow Committee of Lloyd's Register of Shipping and was a member of the Company of Shipwrights in London. He became President of the Institution of Shipbuilders and Engineers in Scotland for three war years from 1941 encouraging and improving education for engineers. As an acknowledgement of his services to engineering education, the University of Glasgow conferred upon him the honorary degree of LL.D.in 1946.

World War II Throughout World War II Frederick Stewart was the consulting ventilating engineer to the Ministry of War Transport in connection with ventilation problems on troopships with convoys worldwide. He was closely linked to Churchill's Cabinet and to the work of fellow industrialist Sir James Lithgow, the Controller of Merchant Shipbuilding. For his war-time industrial service and public service, he was created a Knight in 1944, in which year he also became a Deputy Lieutenant of Dunbartonshire.

In 1946/47 Col Sir Frederick Stewart was one of a small group of funders – including industrialists Sir James Lithgow and Sir James Caird (founder and funder of the National Maritime Museum, Greenwich) – which bought and presented to the National Trust the Chartwell home of Churchill, with life-rent going to Sir Winston and his wife Clementine.

A world traveller Sir Frederick travelled extensively. He enjoyed sailing and flying. On one occasion when he had booked five seats on a plane from Milan to Croydon he had a premonition. He phoned the aerodrome to cancel his reservation and ordered the same number of seats on the following plane leaving three hours later. When he reached Croydon he learned that the earlier plane was missing. Later he read that the machine had been forced down in flames in the English Channel, with loss of life. Many times he crossed the Atlantic, and he was a passenger on the maiden voyages of the liners Queen Elizabeth, Queen Mary, Bremen, and Normandie. Sir Frederick was a member of the three Clyde yacht clubs, and was also a keen motorist.

Sir Frederick was a bachelor and shared the family's home at 8 Lancaster Crescent, Great Western Road, Glasgow and at Craigrownie Castle, Cove, overlooking the Firth of Clyde, until his death in 1950, age 72. The Thermotank business interests - and the Bentley - passed to (Sir) Iain Maxwell Stewart, his 34-year old nephew, being the surviving son of his late brother William Maxwell Stewart.