Earlier quoted context omitted.
For people who want to get around cheaply, London has an excellent mass public transport system, between the tube, buses, and intra-city train services.
You mean if you want to get around quickly . If you want to get around cheaply you need to buy a bicycle (or take a Barclay's bike and keep it under 30 mins).
By comparison, back in my lovely hometown of Plymouth, a two and half mile bus hop will set you back 3 quid. (Fortunately, the taxis are cheap.)
London transport, for what you get, is great value. And it's definitely better than any other big city I've had the pleasure of visiting. Londoners moan about it, but then no matter how efficient or economically enticing, an urban mass transport system will always be associated in the mind with hellish rush-hour commutes, and thus a germane subject for grumbling.