Getting to the underground platform and getting back to street level adds 5-10 mins of wasted time which the bus makes up for but the problem with buses is traf

Getting to the underground platform and getting back to street level adds 5-10 mins of wasted time which the bus makes up for but the problem with buses is traffic. It’s taken me 1 hour to go a mile and a half in London more than once in areas where there is a congestion charge (toll to discourage private cars) in place.