Those sites are good but the one I use all the time is

http://cyclemaps.net/

which has 2 London options - fastest route (generally = scary big roads!) and cycle path route. I use this site every time I need to plan a new route and it is generally very, very good. It has, a couple of times, tried to send me the wrong way up a wrong way street though and I'm in the minority of cyclists who would never be happy to do this!

Hi Jane - Thanks or this, just had a look at site. I like the no frills style and that it gives you the two options. Will put it up on the blog. Thanks and keep in touch

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I'd caution relying on Sustrans maps, they do not enforce standards and have put in some pretty dreadful routes in the past few years. Better to spend a Sunday afternoon exploring a route before using it for Monday's commute.

Agreed. Half the people falling off bikes are usually looking the wrong way trying to find out where they have been!