I've got 97% hearing, so should have a good idea of where sound is coming from.
As soon as I stepped into the Track Test simulator and the normal sounds you'd expect to hear when you're on the tracks, like traffic noise, are added, I didn't make it across in time.
No matter how much confidence you've got in your hearing and speed, when you're in the dark and a train is coming towards you at 80mph, confidence is not enough to get you across safely.
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The plaque at number 16 Cowley Street in Westminster marks the brown brick Georgian townhouse where Sir John lived for 31 years.
A man reportedly armed with several knives has been arrested in Whitehall on suspicion of planning a terror attack, police have said.
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.