Sorry if this has already been analyzed to death, but it seems the "bridge to nowhere"/overheard train tracks only exist for TM access to Ollivander's, correct? I think a lot of folks assumed it was for access to the Leaky Cauldron, but at 4:07 in the new aerial video, you can plainly see access from the bridge into the Ollivander's building. I guess this makes sense for all the TM traffic in and out of that building (actors, etc.).