BRITAIN might not co-operate on economic and other Hong Kong matters following its move to take unilateral action on the electoral arrangements, senior Chinese official Lu Ping claimed yesterday. Speaking in Beijing, Mr Lu continued to fuel threats to disclose documents regarding the past 17 rounds of secret talks. The Hong Kong and Macau Affairs Director told colleagues in the Preliminary Working Committee (PWC) to consider the possibility that Britain might not co-operate on certain issues. ''Therefore, the PWC must speed up work in many aspects,'' the China News Service quoted him as saying. Members reportedly said the Chinese Government should be alert over British moves to plant ''seeds of turmoil'' in the next three years, such as undermining the status of the Hong Kong dollar. ''[We] must prepare for the worst and minimise the possible adverse effects,'' members reportedly said. Yesterday Mr Lu again urged Britain to disclose details of negotiations, together with the Chinese side, in order to reveal the truth. ''Both of us have got our own written documents as the proof, we are not simply saying it.'' ''So I suggested we all made public our documents to show whether we have changed our stances in the 16th and 17th rounds of talks,'' he said. Mr Lu also dismissed Britain's charge that China had altered its stand in the 15th and 16th rounds of talks, leading to the freezing of negotiations. ''Aren't they [the British] trying to shed the responsibility onto us? They claimed that it was we, the Chinese side, who broke the talks. But actually the British side had told us in the 16th round that the 17th one would be the last one [to discuss theless contentious issues].'' Mr Patten said yesterday the full details of the negotiations should only be revealed after the dust had settled on whether there would be future rounds of talks between Britain and China. ''Our position is that when the talks are brought to a satisfactory conclusion, or when they are not, we believe that people of Hong Kong will be entitled to have a full report on exactly what has happened,'' he said. ''Now we're at a situation in which we, on our side, are pressing for more talks and the Chinese are, perhaps, being a little ambivalent about that at the moment.'' ''If we have an agreement, we'll explain that agreement and what led up to it to the people of Hong Kong,'' Mr Patten said. Legislators yesterday called on China and Britain to immediately release details of the negotiations.