Coffee

You do exactly that. You unscrew your flask, pour out a stream of hot coffee into the cup, and use one of the keys to saw your way into the biscuits. You drink your coffee, munch your biscuits, and when you glance at your watch, a whole five minutes has passed.

There’s nothing else for it. You’ll have to start your inspection of the building.

Do you:
Try and work the CCTV.
Begin your inspection of the building.