UK med schools do not care about your SAT score.
You will (usually) need a GPA of 3.6 or above (for the non-Access route).
I'm not sure Kings Lynn will take you with a biology degree either... My understanding was they did not want to be used as a back door entry route by people with relevant subjects but low grades, and were there to act as an access point for people with unrelated and vocational qualifications...
There is no such thing as an uncompetative or less competative UK med school. Expect between 5 and 40 applicants per place, depending on course type and location. This tends to vary year on year as people apply to the one with a low app rate the year before...
EDIT - just read read your post. Hadn't noticed you had only done 1 year of a degree. You will need to talk to each med school individually to see what they will consider. The usual non-degree entry requirement over here is AAA/AAB at A-Level. You will not normally get any credit for an incomplete degree.