Four South African alleged arms smugglers were arrested by HM Customs & Excise officers in Coventry in March 1984 and charged with conspiring to export arms from Britain to apartheid South Africa in contravention of the mandatory United Nations arms embargo. They became known as the Coventry Four. Smuggling activities The four South Africans plus three Britons were charged in the Coventry Magistrates Court on 2 April 1984 with conspiring to export to South Africa high pressure gas cylinders, radar magnetrons, aircraft parts and other military equipment in violation of the mandatory arms embargo imposed by United Nations Security Council Resolution 418. The uncovering of their smuggling operation and subsequent arrest followed the discovery of a shipment of artillery elevating gears at Birmingham Airport in 1984. The Coventry Four were Hendrik Jacobus Botha, Stephanus Johannes de Jager, William Randolph Metelerkamp and Jacobus la Grange. In the front company (McNay Pty Ltd) they operated on behalf of Kentron, Metelerkamp was the Managing Director, Botha was in charge of administration and security, De Jager was the company accountant, while la Grange was the technical expert. One of the ways in which they worked around the international arms embargo was for la Grange to travel to the United States to source military materiel - this would subsequently be imported by Fosse Way Securities in the UK, before being shipped onwards to South Africa via other countries. A fifth man, professor Johannes Cloete of Stellenbosch University – a key player in South Africa's missile development program – was arrested at the same time as the Coventry Four. But, according to The Guardian of 17 December 1988, Cloete's arrest was quickly followed by his release without charge on instructions from senior Whitehall officials. The three British men arrested at the same time were Michael Swann, Derek Salt and Michael Henry Gardiner. Salt had previously been dismissed from another company for manufacturing ammunition dies for the South African military, which he concealed as sewing machine equipment. After his dismissal, Salt continued to deal with Armscor, despite the international arms embargo. His company in Coventry manufactured mortar casing to Armscor's specifications, and also sub-contracted the manufacture of the high-precision artillery gears seized by HM Customs & Excise to a German company. The Coventry Four were remanded in custody and their passports confiscated. After several weeks, they were released on bail of £200,000 when André Pelser, 1st Secretary