BANG Trieu Quang and his two children left for Britain yesterday, after 14 years in detention. But another Vietnamese family, also eligible for resettlement, struggled to raise the air fare. The Bang family was released earlier this month at the same time as Mai Thi Thang and her three children, under what the Government said was a 'special' programme to reunite them with family members in Britain. The Government denied their release was linked to a court case they were due to appear in this week, which would have challenged the legality of their continued detention. Both families fled Vietnam in 1980. After going ashore on the southern coast of China, they were detained at the Fang Cheng refugee camp for 10 years before escaping to Hong Kong. They were classified by the Hong Kong Government as ex-China Vietnamese illegal immigrants and were refused the right to go through the refugee determination screening process. A Government spokesman said it was standard practice for the families or their sponsors to pay the air fare to the country of resettlement when the families were not classified as refugees. About 450 such immigrants remain in Hong Kong, and negotiations are continuing on returning them to China. Nine men, two women and four children were returned to China via Sha Tau Kok yesterday. A further 130 will have been verified by China for return to Guangxi, Hainan and Yunnan in January. Fourteen others have been released because of concerns that their continued detention would have been viewed as illegal. Most of them had been rejected for return to China, and all will now be screened.