Regulated by nannies

I alighted an Overground train at Shepherd's Bush this week, intending to interchange to the Underground. And was somewhat perturbed to see this sign in the Overground ticket hall. Central from Shepherd's Bush Estimated walking time: 7 min No way, I thought, is it a 7 minute walk to the Central line station. It's only across the road, it's 60 metres max, so 7 minutes is ridiculous. Admittedly it's further to go down the escalator and walk to the platform. But it's not 7 minutes, that is the product of a insane imagination. Obviously what I did was time it to see how long it really took. I exited the Overground station, crossed the road, entered the tube station, passed through the gateline, walked down the escalator and walked down to the platform. 2 minutes precisely. Admittedly I got lucky with the traffic lights. Admittedly I'm fit and can walk at an decent pace, but I didn't rush or run. Admittedly I walked down the escalator but the sign said "walking time" so I thought walking…