Isn't there a council estate on East Dulwich Grove which is in an LTN? Mostly it's wealthier households who own cars. Many of those displaying 'clean air for all' (the most objectively ridiculous double speak btw), banners along Dulwich Village Road and EDG have big driveways with 2 or 3 cars in the drive. It doesn't really feel like those against LTNS are the less well off, fighting the more affluent.