bharats

The contact form is a good way to get through to the immigrant visa unit to make a request.  I am not really familiar with the document submission email or who monitors that one. It could all be the same blokes. I just don’t know. Hopefully your status changes to issued shortly and the  suspense will be over for you. 

tax transcripts do show the ITIN which is identified by the 9 that it starts with -not an issue
i hope you marked the part on ds 260 for USCIS to apply for the SS # when you arrive/ otherwise take the passport with CR1 stamp to SS office and apply for one
When you get that SS card ,  notify IRS of the SS # that replaces the ITIN
 

Yes. You can do that. I have read this UK forum since 2008 and it has been done. If you leave the country, they will have to see your passport after. If you travel to one of the security sensitive countries, your security clearance check will have to start over since it amends travels listed on your visa application (DS-260).
 
No. Unlikely. You are mixing IRS issues with State Department visa concerns. How you filed taxes is not something the embassy can review. IRS files are not accessible to DOS. Any visits to the US are likewise not important based on their length. That’s a DHS issue (USCIS and Customs and Border Patrol). The embassy is just looking to see if you meet the requirements for your visa. Your delay is most likely a security issue they have to clear. That’s what 99% of anything beyond a week after interview (or after missing documents are received) is about. They will not tell you what they are checking or how long it will take. 
 
Sometimes you never figure it out, but few visas are denied in London.

Although the ITIN can be used to file taxes, you should have also applied for a SSN on the DS-260.  The SSN would then replace the ITIN. 
 
 

Just an update to everyone.
had my interview yesterday. Got 221g slip. Uploaded the extra document on the same day and emailed them notifying them.
this morning at 8.58am I received an email from them saying that the officer is now reviewing the document.
at 9.08am received another email saying that my visa has been approved.
Status changed to AP at 9.15 and then an hour later it had changed to issued.
email from DX a few hours later.
passport to arrive tomorrow.
that is a 24hr turnaround even with a 221g. London is definitely moving quicker. As has been said before, London tries to work with you here rather than trying to trip you up. As long as you’re honest and straightforward, all will work out.
thanks to everyone on this forum. 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

Woohoo!
DQ'd 16 December 
Interview 26 April
 
Here we goooo!
 
I feel like a kid on a roller coaster, butterflies in my stomach, head a bit woozy! 

DQ on 16 Dec, so hoping for April too. I sure hope they do release a nice large juicy batch of interviews for April within the next couple of weeks!!

Hey Crew - We have an interview on Jan. 25th and as @twobees mentioned it looks like everyone that's getting bumped are sitting on a Wednesday for the time being. 😕

We've not been rescheluded yet, but I wouldn't be suprised if it's just not happend yet. If it does, I'll let everyone here know that's it not just a Wednesday phenomon (6, 13, 20).