US Immigration from Ireland

Finally got past the petition stage (only took a year!), yay!

My case has now been sent to the NVC. They have recorded my Foreign State of Chargeability as UK (I assume because I was born in Northern Ireland) but I have an Irish passport (due to the unique situation of nationality within Northern Ireland) and I requested in the petition to have my interview in Dublin. The NVC, for some reason, have put London as my interview location.

Can I:

a) attend the London consulate on my Irish passport for my interview?

or

b) get the NVC to change the interview location?

I sent them an email but they are slow to reply.

Thoughts much appreciated,

Thanks

I just got word that my U Visa got approved! anyone been through this? what should i expect from this point onwards? Thanks.