How much help is UKCAT

Hey guys,
I was never interested in medicine at GCSEs so I recieved terrible results, got Bs and Cs.
I do not meet mini requirements for GCSEs like english langauge of achieving a B, instead i got a C.
I am predicted for A*,A*,A for chem,bio and maths, this is according to my mocks in AS. I may do well in UKCAT, will universities still consider my GCSEs? Like KCL and UCL? I really want to get into these unis instead of outside London. DO they really care about just 1 min requirements not being met and that is English language.
Thanks for reading.