LAWYERS for Seapower International Holdings managing director Francis Yuen Tin-fan have written to confirm documents taken from the company contain no evidence of criminal conspiracy. Mr Yuen said yesterday that neither he nor the company were involved in an alleged plan to take over the National Mutual insurance company. Speaking from his Alexandra House office in Central, which was raided by police last Wednesday, Mr Yuen confirmed that some documents had been taken away by Commercial Crime Bureau (CCB) officers. Mr Yuen, who is a former chief executive of the Hong Kong Stock Exchange, said documents were taken from both his office and his home. He said the company's lawyers, Richards Butler, who were present during the search and read all the documents taken away, said in a letter to Mr Yuen: ''In our view, no evidence of 'criminal conspiracy' was uncovered by the CCB today [last Wednesday]. The few documents removed by the CCB [from Seapower] were irrelevant. ''We have already spoken with the police about the alleged theft of papers from National Mutual premises and with the Computer Crime Section of the CCB with regard to alleged theft of computer programmes by Top Glory staff. ''Both these investigations failed to uncover any evidence of wrongdoing, and have, we hope, been dropped.'' Mr Yuen confirmed the company co-operated with the police. ''They were quite polite. The research was professionally handled. I don't have complaints,'' he said. Mr Yuen found himself named as a key figure in a controversy involving an alleged takeover of National Mutual earlier in the year. At the time, his company was named along with Top Glory as being interested in encouraging National Mutual agents to join a new insurance venture. Some Top Glory employees, previously employed by National Mutual, also had their offices and homes raided by police last week, although no documents were taken. Mr Yuen said the CCB, when it searched his office and home, did not explain to him what he was suspected of committing: ''The search warrant just said they needed information in relation to a takeover plan on National Mutual.'' Mr Yuen said he knew nothing about a takeover plan. ''Neither Seapower nor I have ever thought of taking over National Mutual. I have no idea how we can be related to the takeover plan,'' he said. He added the size of National Mutual, with about $7 billion to $8 billion in assets, would not be an easy takeover target. ''If you say Seapower International wants to take it over, I can tell you we're not qualified,'' he said. ''I just gave them whatever they wanted,'' he added. He would not comment on speculation that the police action stemmed from complaints from National Mutual. ''I don't know. Apart from knowing from the search warrant that it needs information relating to a takeover plan on National Mutual. I don't know what that takeover plan was,'' he said. National Mutual announced net profit rose 48.8 per cent to $353 million and there was a 20 per cent jump in total premium income to $1.88 billion for the six months ended March 31. There was a $30 million exceptional item in the company's accounts representing spending on financial incentives to retain employees, public relations costs, consultancy costs and legal fees. There was no estimate of lost sales. Top Glory Insurance Co (Bermuda) and its executive vice-chairman Andrew Yang said at the weekend they were innocent of any wrongdoing. National Mutual chairman and president Sir David Akers-Jones also distanced himself and his company from the police investigations. ''We have not been approached by the Commercial Crime Bureau,'' he said. John Snelgrove, of National Mutual, said: ''We don't believe or expect the CCB to approach us to help with the investigations. The matter is between the CCB and Top Glory.''