@appleblossom actually I didn't get anything specific - below is email I got
We are pleased to confirm that we have received an approved immigrant visa petition in your name. Petition approval does not guarantee visa issuance. IMPORTANT:In order to apply for the visa, you are required to
complete the steps on our website athttps://uk.usembassy.gov/visas/family-immigration/how-to-apply-2/
Make sure you have all of the documents listed on our website before you book your medical exam or visa interview. Only the Embassy’s panel physician in London can conduct the medical.
Disregard any references to sending documents to the National Visa Center (NVC). As your application is being processed by Embassy London, you must take your documents with you to your visa interview.
Only a consular officer can decide if you qualify for a visa, following your interview. As we can’t guarantee an outcome by any set date, we caution you against resigning from work, giving up accommodation in the UK or making final travel plans unless you have received your passport containing a valid immigrant visa. No expedited visa processing service is available.
Should I contact the NVC and ask them to see if they could book my interview with London now? NVC timeframe indicates they reply in a week.
how would it work in case anyone wants to reschedule their IV interviews? Don't they have to go thru the AIS website (which by the way always shows system is busy!)
l speculated how things became easier until this!