Missed my connecting flight because of LHR arrogance! We arrived from Charlotte US and needed to get the next flight to Madrid. We had 1.45 hours between flights. We had tickets with United Airlines from Charlotte to Málaga. Our flight Charlotte _London arrived on time. We went to pass security check before boarding and the were doing training in all the steps explaining in detail everything to the new employees. We told them that we were going to miss our connection flight and an officer who seems to be in charge replied not nicely at all that we need to de two hours in advance. We told him it was a connection flight and he did not respond. They hold us there around 1 hour and a half. People were complaining that they were missing their flights too. In other airports security checks take at most 20 minutes. You can not train people explaining in detail the scanner, checking and opening g all contents in bags making them do test 2 or 3 times and making people miss their flights.