TfL have produced a nice range of maps to promote walking instead of public transport (especially during the Olympics). The maps use different cartography to the other walking maps TfL have produced, and feature a nice range of pseudo-3D buildings and key landmarks. There are also 4 concentric circles that give an approximate walking time up to 25 minutes away. These have been centred over the “hotspot station” the map was produced for- in this case Fenchurch Street.
The maps were being handed out to hardened city commuters who I expect do most of their onward journey by foot anyway. Hopefully TfL will continue to distribute these maps right up to and throughout the games. I can’t seem to find an online version of these so keep an eye out for them at your local “hotspot” station (of which there are many).