Police have issued a warning following several incidents in Cambs where two men have posed as police officers. Always take precautions when answering the door to anyone you do not know. If you are approached by police the officer should always show their I.D.;  if they don’t ask to see it.  If they do not have proof of I.D. contact the police via 101 or 999 if you are in immediate danger.  It is very rare for police officers to call without making an appointment first;  always be suspicious.