Just thought I would give a bit of a review as I found this thread so useful. We had our interview yesterday at the London embassy and thankfully approved, no issues.
When inside the embassy it was very straightforward, I would add though that getting in was a bit hectic. You need to ignore the queues and go to the front and say you are there for a Green card interview. You will then go straight in.
Take all the documents requested, however we didn’t get asked for any of our financial documents just basic civil ones.
A question I do have for those who have been approved, how long did it take for you to get some sort of tracking number of your passport being returned? I can log into our courier service but can’t see anything like a tracking service.
Any questions, please ask!