Interesting figure, but the Waterloo & City is rather unique in terms of its operation. Are there figures for any of the more traditional tube lines?
Much lower - Piccadilly Line £2.10 per £1 spent.
For comparison -
HS2▸ started out at an initial estimate of £2.40 per £1 spent............at the last IfG review it was down to £1.30 per £1 spent, so perhaps
TfL» should proceed with caution on this basis, although it appears that the Government are prepared to pick up the bill, so prepare for a nationwide debate on why the whole country should pay for a project which only benefits London................