Originally Posted by corporate-wage-slave

For all T5 departures, without exception, you must clear the initial security scan point by 35 minutes to departure, and any bags must be checked by 45 minutes - these are hard coded. The only flexibility is on the Flight Connections security, which can be down to 25 minutes depending on circumstances (e.g. T5B to T5B would be 30 minutes and is quite do-able)..