United Kingdom - Passport & Nationality - British Overseas Citizen (BOC) - Penang & Malacca
Because of how the Constitution of Malaysia determined how citizenship was granted, those born in Penang and Malacca (now part of Malaysia) were automatically granted British Overseas Citizen (BOC) status.
It was also possible to obtain this BOC status from one's father if he was born in Penang and Malacca. This status was maintained after Independence, unless the applicant was born in the Malay States, North Borneo or Labuan, or Sarawak.
It is possible under some circumstances to upgrade this BOC status into full British nationality - most commonly if Malaysian citizenship was not granted automatically upon independence.