Filming Doctor Strange in London

On my way to work today, I caught a glimpse of Marvel shooting Dr. Strange in London looking like a street in NYC. I was using Periscope to share it on the web and I spent time answering questions to the people watching as it was happening. Couple of points: Yes I know that Martian Manhunter is DC and Dr. Strange is Marvel someone on Periscope was trying to help me figure out Chiwetel Ejiofor s name. A bit of a mix up there. And the video was shot in portrait because I was using Periscope to sha