British National (Overseas) passport

The British National (Overseas) passport, commonly referred to as the BN(O) passport, is a British passport for people with British National (Overseas) status. BN(O) status was created in 1987 after the enactment of Hong Kong Act 1985, whose holders are permanent residents of Hong Kong who were British Overseas Territories citizens (formerly British Dependent Territories citizens) until 30 June 1997 and had registered as BN(O)s.

Source: Wikipedia — British National (Overseas) passport (CC BY-SA 4.0)