Away from the NCR at Hanger Lane
Like many parts of the North Circular Road, the Hanger Lane section is busy with fast cars and polluting lorries. On a dry bright day, if they don't mind creepy crawlies of all shapes and sizes, pedestrians have an option to walk inside small woods, that run alongside the road. This cache is hidden inside one of them.
It would be good to hear your experience of the air quality in London in your log!
The GPS was very jumpy when I set it. But I also attempted to reference nearby buildings. So hopefully, it won't take too long to identify the host. Please replace cache as found. You may require tweezers.