I am an American and my partner is British. We meet in school and had been living together for 2 years or more. I came to the US to apply for and Unmarried Settlement Visa with the UK. I did a lot of research on what's needed and thought I would share that along with my processing times. I hope this helps some people out. It was extremely stressful and I hope my experience can help someone, just remember its stressful but if you have all this and meet the requirements you should be good.
May 30th Made online application and book Biometrics while in the UK (I could of waited till back in the US but didn't want to)
June 12th come home to US to Biometric appointment
June 12th paid for Priority Settlement and sent application to New York
June 21st contacted World Bridges because I had no confirmation email yet
(they sent an email on my behalf to Sheffield, this was the first time I found out it was sent to UK to be processed)
June 24th receive a confirmation email the Sheffield was processing it
June 26th received and e-mail that they made a decision and were sending it back to me. Didn't say what decision though, stressful.
July 1st Received my package with the Visa in it!!
Here is what I sent...
1.Both of your passports (or notarised copy of the British passport plus original birth certificate if born in the UK)
2. Evidence of living tog for 2 yrs – official documents and/or other letters linking you both to the same address for 2 years
3. Any divorce/death certificates from previous relationships, original
4. Evidence of accommodation – lease/mortgage statement, original
5. Evidence of income/financial support – 6 or 12 months payslips on company letterhead or stamped and signed by HR, 6 or 12 months original bank statements (or online statements stamped on every page), letter from employer stating start date, salary arrangement including basic plus commission, income for the past year, and if position is permanent/fixed-term contract/agency (if only 6 months pay take the total divide by 6 and then multiply by 12 and that the answer for income)
6. Letter of support from sponsor – Nature of relationship and "we plan on living together permanently"
7.Evidence of relationship – add evidence of the intimate nature of your relationship such as photos, cards to each other, e-mails to each other, etc.
8. One full set of copies
9. Application form – newcomer link: http://www.visa4uk.fco.gov.uk [nonactive]
10. Appendix 2 - attached
11. One passport photo of you – no hats or glasses, neutral expression, plain light background.
Also I had a massive mix up back in March and the UK Boarder patrol thought I had over stayed on one of my previous visas and almost deported me, but I got it all straightened up and was ok. I wrote all that out in my application and still was fine.
Basically I recommend Priority Service with WorldBridges because they can help some and it did pay off in the end. Sending it the Sheffield I think helped as well.