POLICE investigating the murder of two mainland Chinese men in London suspect they may have run into trouble with the group that financed their passage to Britain. Cheung To, 25, and Lam Fei, 23, were found with knife wounds at an east London house last week. Intensive inquiries in Britain have so far failed to come up with any firm motive. They were not known to any Chinese community or refugee group and the belief is that although they were claiming political asylum they were not political dissidents. Police admit they have no firm leads but one suspicion is that the men may have failed to repay loans which brought them to London by air from China. The Home Office refuses to discuss the men, as is normal in asylum cases, but it is understood that although they had applied for asylum after arriving in Britain late last year they had not received a formal decision on whether they would be allowed to stay. One lawyer working with immigration cases yesterday said it was unlikely the men would have been granted asylum under current Home Office rules.