“I walked everywhere”. Yes, pretty much. At one point I even started running to work, though just as I started to actually enjoy it, my ankle started giving me grief and I went back to walking. My maximum commute time was for a temp job south of the river – it took me about an hour and twenty minutes to get there, I sometimes got the tube home, but not always. For another job I used to walk to Islington and at the end of the day walk to a martial arts class in Bloomsbury. For many years I did between one and three hours walking every day. Often at weekends I’d read a review of an interesting book in the Sunday papers and then walk down from Kentish town to the Bloomsbury branch of Waterstones to buy a copy. When I had spare time, rather than popping out to nearby Kentish town high street for some minor item of shopping, I’d walk up to Hampstead instead, so as to have the pleasure of shlepping over the Heath.
I like walking. It’s great. Very unpretentious, doesn’t need a ton of kit and you see more than you do on the bike. However, as the distances increase, in order for it to be a viable mode of transport you have to be brisk, so issues of sweatiness start to arise. Changes of clothes, special footwear and assorted carrying equipment start to be incorporated – it starts to become more like cycling in fact.
Psychobikeology 
One of the nice thins about London is that everyone’s not always in the car. I do take the train to work, so I’m not as hardcore as you, but if I don’t have a brisk walk at some pointin the day, my body knows something’s wrong
Gosh! Someone is reading this! Thanks for commenting. I ain’t hardcore anymore though … as you’ll see from the forthcoming posts …