Just wondering what the average length of delay is across the Tube network.
The Customer Charter allows anyone to claim refunds for a delay of 15
minutes or more. I'm guessing therefore that the overall average would be
lower than this.

On another note, but kinda related - how much extra time do you factor in
for delays whilst travelling to work to ensure you get there in time. I
leave at 8:30am for a journey from Blackhorse Road to Brent Cross to arrive
for 10am and still can often be 5 mins late