Hi Chris, I think you're missing the point I was trying to make.LBHF are quite happy to allow all its residents who have CPZ permits to pass through the wider area LTNs that have been introduced in LBHF - non LBHF residents aren't allowed to do so.The same isn't true with Hounslow council - they aren't amenable to this idea. So I think it is very much to do with the council!In a similar vein, I think that in RBKC if you are a resident with a parking permit, you can park anywhere in RBKC. Pretty sure that used to be the case, and it may still be that way. Again, very council dependant.
Andrew Jones ● 23d