THE police exchange programme for senior officers from Hong Kong and Britain is to end. Police yesterday revealed that the scheme - which has seen 22 officers swap for two-year terms since 1984 - would end in June next year. A police source said it was due mainly to perceived logistical problems in continuing the programme after the Chinese handover. But senior staff officer, personnel and career development, Senior Superintendent Frank Murphy, yesterday said he doubted that political considerations had played any role in the decision. ''It will end,'' Mr Murphy said, ''but it has really only ever had a finite life in any case. ''We have all considered it a highly successful programme and with the number of officers we have sent through the scheme, we believe we have achieved all that we set out to do,'' he said.