US kids passport questions

I need to renew my daughter US passport.  She's 5 years old and her US passport expired already. 

My question is

The US London embassy moved, so I assumed they also don't allow phones, cameras and things with batteries.  So is there a place that can hold it, locker or something in the new location or I'm just going have to not bring it.

Is the new US embassy location is not part of the congestion charge zone? 

Where is the lowest priced nearby parking spot?

Is there anything I need to bring or be prepared for when renewing the passport?

Thanks
 

I'm not sure on the location questions as I haven't been to the new embassy yet (opens on Tuesday).

However, you can bring electronics to the embassy.  Only items with a keyboard are not allowed (so no laptops).

You'll need the items listed on the renewal application.  The big thing is the age progression photos depending on the age of the child.  It's straightforward.