Hi Bongolips,
After reading your post I was wondering if you knew that UK citizens can come to the US without a visa?? Why not just let him/her come here first?
About the K1- ummm yah... it takes a while. I filed the petition in October for a K1 for my fiance - and not so much as a peep from the USCIS. I mean we got the standard reply .. "blah blah we have your application and will process applications in the order they were received.. blah blah"
From all the boards I've read - it takes 6-8 months to get processed.
I think you won't have any problem bringing your fiance here to visit after xmas to visit - but even if you are "processing a K1 fiance visa, he/she cannot stay here on a tourist visa passed the 90days allowed - even if you've filed the petition- because the petition is not approved and your fiance is still considered a tourist - until the petition is approved - the status of the foreigner does not change.
However, if you get married right away - within the 90days (usually the time allowed for a tourist visa anyway), then you would apply for a K3 - which is a spousal visa not a fiance visa.
However, I am not sure if he/she would have to return home - if you are married and he/she is already here.
But, I will say this...
if you get married while on a tourist visa - and process the K3 paperwork that way.. I've read and heard that it really pisses off the US government b/c then they think you are trying to go around the rules and not doing things the right way. I'm not saying they would hold up your paperwork on purpose, but I am saying that IT WILL take longer.
I would read up on the US visa webpage for more info. Go to
http://www.state.gov/travel
then go to "immigrant" visas - it will be under K - or spousal visas.
Also, all the info I've provided is from my own research on the USCIS site, the State.gov site, forums and immigrations sites, etc. I could be wrong- but I have done my research... i'm not saying I'm a know-it-all.. just saying.. i'm in the same boat as you.
GOOD LUCK and happy holidays!!