If you don’t have some clinically relevant experience or educational experience you’re not going to get to interview, let alone an offer, for postgraduate SLT. I would recommend applying to a three year undergraduate course instead and try getting some experience in schools, doing some relevant reading and reflection on said reading. Alternatively, take a year to get some experience with some SLT client groups and then apply to postgraduate courses.
If you want to know more, let me know.