This is amazing, just spend 30 minute pouring over it and have barely scratched the surface. I was surprised by the number of exits late at night at Heathrow T

This is amazing, just spend 30 minute pouring over it and have barely scratched the surface. I was surprised by the number of exits late at night at Heathrow T5, I guess it's all staff arriving for nightshifts, as there aren't many turning up to get planes at that time (last flight is 2240, meaning the latest you can enter security is 2205, meaning that you need to be off the tube at 2200 at the latest, and I doubt many risk cutting it that close)