BMARC (The British Manufacture and Research Company) was a UK-based firm designing and producing defence products, particularly aircraft cannon and naval anti-aircraft cannon. It was based on Springfield Road (a part of the A607), Grantham, Lincolnshire.
The company was created during the start of the World War II rearmament period solely as a weapons producer. In 1943, for example, it fulfilled 46 % of the UK's demand for the Hispano-Suiza 20 mm cannon. The remainder came from the Birmingham Small Arms Company (BSA) - 25%, a Royal Ordnance Factory - 25 % and the Royal Small Arms Factory - 3 %. At the time of the Battle of Britain in 1941, 20 mm cannon were only just starting to arm the Spitfire and Hurricane. By 1943, the RAF had converted entirely to cannon armament for its fighters. Grantham received 21 raids by the Luftwaffe for precisely this reason, which killed 70 people in 1941 (around the Commercial Road area).
BMARC was a subsidiary of Hispano-Suiza, then was owned until 1987 by Oerlikon, the Swiss defence contractor, when it was sold to Astra Holdings (head office in the USA). In the 1990s, the company was investigated for alleged illegal dealings with Iraq. Jonathan Aitken was a non-executive director of the company, and in a libel trial in March 1997, BMARC was accused of selling weapons to Iran.