just to elaborate here: the OP will likely need to file subpart F income for his UK-based controlled foreign corporation (CFC). this means that any income he generates from the UK entity passes through to his US taxes.

additionally, he will need to file a TD 90-22.1 with the department of treasury by june 30th of the year after the account has more than USD 50K in it.

tax avoidance is a complex beast and simply incorporating a business in another jurisdiction does not in any way exempt you from US tax liability.