Since I passed all my stages yes, the 3 hours include all the 4 papers.
I had the morning slot and made a flight out of Heathrow by 6 with around 2 hours margin as far as I can remember. We can disregard the fact that a thunderstorm caused me to end up in Copenhagen instead of Gothenburg
If you want the exact times and the entire story I think I posted it here, the post should be from just after rememberance day so November 13th I'd guess.
Edit: My stage 1 was 2 years ago now, so you have to go back to november 2011 to find it.