Oh crap, I didn't include pictures or letters either. Just tax returns and the birth certificate of our son. But dear lord, as a non-American, I've had to apply for a visit visa every single time we had to go to the UK for holidays (pretty much every year for the last 4 years), for which my in-laws had to write a letter of invitation and accommodation, so hopefully they still have all of that on record!
Well, nothing we can do now but wait.
Our lawyers just got the package and are going to send it off to Sheffield soon.
It's been a long, long process. Now begins the back-breaking work of (continuing) packing, sorting, throwing away, giving away, shipping, etc. And to take care of the thousands of details involved in ending a life in one country and starting it in another.