Seven Sisters Rd still isn't a 20 zone due to it being a TFL road.
TfL have long-term plans to extend 20mph to much of their network. It's moving at a glacial pace, though (no 20mph jokes, please). I'm pretty sure that SSR is somewhere in the pipeline, too.
@aggi started
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Seven Sisters Rd still isn't a 20 zone due to it being a TFL road.