公海嗰邊好多人都話終於有途徑取消中國籍。終於可以申請BC - you are not likely to get British Citizenship this way. You need to look at section 4B of the British Nationality Act 1981 -
4B Acquisition by registration: certain persons without other citizenship
(1)This section applies to a person who has the status of—
(a)British Overseas citizen,
(b)British subject under this Act,
(c)British protected person, or (d)British National (Overseas)
(2)A person to whom this section applies shall be entitled to be registered as a British citizen if—
(a)he applies for registration under this section,
(b)the Secretary of State is satisfied that the person does not have, apart from the status mentioned in subsection (1), any citizenship or nationality, and
(c)the Secretary of State is satisfied that the person has not after the relevant day renounced, voluntarily relinquished or lost through action or inaction any citizenship or nationality
(3) For the purposes of subsection (2)(c), the “ relevant day ” means—
(a)in the case of a person to whom this section applies by virtue of subsection (1)(d) only, 19th March 2009