the problem I have with security at T3 is that despite it being upgraded it is now not fit for purpose as the staff insist on spreading your things over 2-3 trays and then the trays get clogged up.
Yesterday I put my bag and laptop in one tray side-by-side with my suit jacket ontop of the laptop. This would have been fine before but they took the suit jacket and put it in a second tray as that is what they are now doing.
I'm not blaming MAN if that is what they have to now do but it's this splitting that was causing the issues. There was no queuing at all for the body scanners due to the delays loading the trays.