I'm lucky enough to have a free place to stay next week in London. Looks like a fabulous up-scale flat on Wapping High street about a mile east of the Tower of London. The person who is letting me use it advised that the closest tube stop is also a mile and recommends using a car service (cheaper than a taxi?) to get around. I'm more of a budget traveler and have used the tube in the past, although it was always within a few blocks. What about taking a bus to a tube station? Would that be a huge hassle? Can a car service really be a reasonable option?