We don't know. It depends on a number of things, which change year-by-year and course-by-course
- if they have already filled all the places with people who did meet their offer, or if they still have a few spaces left
- if they think they can fill up their remaining spaces with better quality candidates by going through clearing or by accepting people who just missed their offer
- whether the grades that you actually got were ABB or higher (universities can be fined for over-recruiting people with BBB or below; this is not the case for people with ABB+; I'm not sure what the situation is for people doing IB)
- how narrowly you missed your offer
- if there was anyone else who missed their offer by a narrower margin
- whether you are an international student (if you are, then you are more attractive because you pay higher fees, and the government can't fine the university for over-recruiting internationals)