Thank you for the prompt replies. In that case, I couldn't really qualify as a business visitor given that I have intention to stay in the UK long term. What I might be able to do, however, since I intend to be back in the U.S for the Christmas season, is go over as a business visitor in October ...

I am a United States citizen and will be (tentatively) applying for my visa from outside of the UK. My current employer is a medium-sized enterprise who has just opened a subsidiary branch in London. They have offered me a role in account/project management, sales, and consulting at the new office ...