Originally Posted by corporate-wage-slave

It's a different set up to T5, T3 doesn't have Ready To Fly, which is a cast iron system which regulates the whole flying and baggage process of T5, instead T3 uses Positive Boarding, with a much lighter touch. You can go through Flight Connection security without a boarding pass and then collect it in the main hall area, though I can see with that timeframe you are not going to be doing that.