Heathrow is a fucking labyrinth
The number of people I have asked for directions today is higher than I've talked to in 2 years
@Gargron Gotta earn those connecting flights 
@Gargron I recommend Citymapper for directions when you're in London. V. good
@Gargron
See also: trying to leave it either by car (the nearby roads are a maze) or by train.