Gap year applying for kings EMDP 2019 entry help pls!

I am currently taking a gap year having achieved AAB at A-Levels. Got 2As in Bio and Chem and the dreaded B in Maths. My GCSEs were 6A* and 5A.

I really wanted to apply for the EMDP course last year but my sixth form did not allow me to as they thought I would never get in and that I had no chance (had a lot of terrible experiences in my sixth form but not gonna rant about it too much.)

What really is worrying me now is my UKCAT which is really low. I have a UKCAT score of 590!! I am scared that I have blown away my second chance of getting into medicine so someone please tell me if I have a chance applying for the extended medical degree programme at kings.

Also I know some of you might say i should apply to unis that rely less on the UKCAT but I can't move out as I am caring for my mother who is a lone parent so cannot possible think of leaving her all alone. My options are limited to london Unis.