Just a quick heads up to warn anyone thinking about cycling down these two roads: I suggest you think again unless you're on a full sus MTB - the surface is absolutely awful.
I was heading down to Stockbridge after POP and this was the most direct route. I knew that the cobbles on Howe Street were pretty uneven, but I figured they were do-able on my hybrid. They were, just about, but Circus Place is an absolute nightmare of displaced cobbles at irregular angles, dips and holes. At one point my handlebars were shaking so much that my hand engaged the brake quite hard completely unintentionally.
The situation of trying to roll down there under control was obviously not helped by a taxi two behind me sounding his horn, presumably to "encourage" the driver directly behind me (who seemed to be kindly keeping his distance) to overtake. Naturally, once he did he and the taxi were promptly held up at a pinch point and I sailed past...
I'll report to Clarence but just thought I'd put this out there.