Friday 1 February 2008 10.51am
It is nothing to do with the road layout of the one-way 'West London link' roads.
A bit of googling tells us the answer.
(see end of page 1, beginning of page 2).
The Mayor consulted everyone on it, and whilst not scrapping the scheme like a majority of the public who responded to the consultation wanted him to, he did alter it. The Royal Borough of Kensington and Chelsea asked the Mayor to give the resident's discount to all borough residents, rather than artificially 'cutting off' west of Warwick Road. This would render these areas less attractive to developers. This area is more deprived than other parts of the borough and has large vacant sites awaiting redevelopment.
It is a unique case since the western extension covered the vast majority of their borough and they did not want a small part of it to develop in character and economy differently. Westminster is entirely within it and Camden, Southwark, Lambeth and Tower Hamlets all have only small parts of their boroughs in the zone.
I haven't decided if I agree but if Ken Livingstone agreed with them there must have been some substance to their argument!