The British Aircraft Corporation developed the BAC 167 Strikemaster as an armed offshoot of the highly successful Jet Provost trainer. The airframe was strengthened and given protective armour, underwing weapons hardpoints fitted, provision made for machine guns, and an updated version of the Rolls-Royce Viper turbojet engine installed. The result was a type suitable for both the light attack and advanced training roles, aimed largely at countries less able to afford 'higher-end' combat types. The first Strikemaster took to the air in 1967, and the type served with Botswana, Ecuador, Kenya, Kuwait, New Zealand, Oman, Saudi Arabia, Singapore, South Yemen and Sudan. Of those, Ecuador, Oman and South Yemen used the aircraft in combat. All Strikemasters have now been retired from military service, but many fly on in private hands, including the ex-Royal Air Force of Oman Mk82A model of North Wales Military Aviation Services that will attend RIAT 2017.