They specifically stated they want pictures of traditional marriageI didnt get any additional document request but I will suggest that you provide anything and everything that validates your relationship.
With mine I provided
1) Marriage certificate (Registry + Church)
2) Pre-marriage class certificates
3) My baptismal card to show my spouse name (under sacrament of marriage details of partner)
4) whatsapp chats btw us
5) Clippings of our wedding posted on blogs
6) clippins of our wedding posted by family on social media - IG and Facebook.
7) My account statement that showed I was always collecting money from him.
8) pictures of church, trad, court and casual outings (max 20)
Just add everything and anything that helps your case. Nothing is too much oooo...