The 125 Executive Jet

de Havilland DH125, Hawker Siddeley HS125, British Aerospace BAe 125, Hawker 125 and Hawker 800/850

Argentina
Argentine Naval Aviation operated one HS-125-400 for navigation aid calibration.
Argentine Air Force A single HS-125-700 was impressed into Escuadron Fenix during the Falklands War in 1982

Botswana
Botswana Defence Force Air Wing

Brazil
Brazilian Air Force

Ireland
Irish Air Corps

Japan
Japan Air Self-Defense Force

Malawi
Malawi Army Air Wing

Malaysia
Royal Malaysian Air Force

Nigeria
Nigerian Air Force

Pakistan
Pakistan Navy

Saudi Arabia
Royal Saudi Air Force

South Korea
Republic of Korea Air Force

South Africa
South African Air Force
No. 21 Squadron SAAF

United Kingdom Royal Air Force
No. 32 (The Royal) Squadron
No. 55(R) Squadron RAF (Dominie T1)
No. 6 Flying Training School RAF
Royal Air Force College Cranwell

Uruguay
Uruguayan Air Force