[JAlexoid]

If you're comparing walking, driving and public transport, then at least pick realistic scenarios.

Waterloo to St Pancras will never be a 12 minute drive, even at 4AM - that's practically impossible with the amount of traffic lights.

Let's presume that you're a wealthy Lloyds Group banker(City of London office) living in Holland Park area. Your commute is 35-1:30 by car or 27 minutes by public transport.

Or you're not so wealthy Canary Wharf worker living in Southwark - stable 20 minutes for PT and 30 minutes driving.

[n4r9]

At 4am next Tuesday morning Google actually says 9-18 minutes. I assume they have quite a lot of data to model this on, so blame them!