P214 ORACLE 214 Fri31 Dec ITN 0030:10   BRITAIN WARNS  DENMARK NOT TO POACH Britain has warned Danish fishermen that it will act against any illegal fishing in British waters from Saturday The warning from Scottish Fisheries Minister Lord Mansfield came within hours of Denmark's final rejection of a common EEC fisheries policyN A Danish watchdog committee turned down an offer from the nine other EEC countries aimed at averting a fish war. It also threw out a plan giving the EEC more time to solve the crisis. The Republic of Ireland's six-ship Navy has been put on alert to deal with any encroachment by Danish trawlersN