billythefish
toad licker
Only if there is one car per household. I'd guess that in a lot of Lambeth it's lower than that.
Where I live I reckon it's more like one for every two households - though my street is about 2/3 council- so that probably has an impact.
The trend in my street is for one-time family homes to be converted into two or three flats - putting loads of extra pressure on the space, not only for cars, but wheelie bins and so on.
With out a reasonably high price for permits, things would be even worse and, as another has said above, it must surely be a matter of old fashioned supply and demand that determines the price.