Why don't you just marry in the US? Very little, if no red tape when processing your marriage certificates, plus your British partner can go there without a visa under the 90 day visa waiver program. Get married there, get your marriage certificate, then apply for a spouse visa through your British partner. Your marriage will be recognized in the UK so long as you have your marriage certificates with you. In some states, they have a a "3-seal" certificate, signed and certified by more people in the city government office, and used specifically for international recognition of the certificate. I come from Northern VIrginia, and had the "3-seal" version, which was a bit more expensive than the regular certificates, but wanted to make sure. I'm alreayd here in London, and no problems with the marriage papers so far.

 

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I'm in a really similar situation, and it looks like it's easier for my Britsh finace to come to the US to marry me. I haven't been able to find good information on this, though, so I have a couple of questions.
Is it necessary for him to have a visa to come to the US to get married, even though he will remain a British citizen? If so, how far in advance should he apply for the visa? (We're planning to get married this summer.)
Also, can he apply for a finance visa while we are both in the UK, or do I need to be in the US for some reason?