Most schools should enroll you without thinking twice about it. If there's a program that interests you, I'd contact them and ask whether there's any barrier to enrollment for cash-paying foreign-based students. I'll bet they say no. As for high school, there are third party evaluation services that can verify your British high school diploma is the equivalent of an American one. The school you attend will direct you to one. In fact, if you did A-levels, you may get university level transfer credit for them.
-=Steve=-
P.S. Nice try, but the purpose of our forum is not to provide your startup with SEO.
B.S., Info Sys, Charter Oak State College
M.A., Educational Tech Leadership, George Washington University
Doctor of Health Education, A.T. Still University, in progress