Can anybody advise how to register a formal complaint against a particular member of staff at the Security checkpoint, for undue harassment on 25th November from Terminal 4 at approx 6:15 am. While we can all appreciate the need for vigilance and thoroughness at airport security, this Security Agent's sole aim appears to have been passenger harassment. While saying she was searching for liquids, she seemed to be more interested in checking every piece of paperwork and other quite obviously non-liquid contents of my handbaggage!... read full review »