Hi there,
I'm gonna be studying International Relations in Sept, so a very similar course from the same department, so I think my experience might help.
When I was taking my A2s, I was predicted AAB but they wanted AAA, and so King's rejected me. But I knew I was gonna do better than AAB, and was right because in the end, I got A*AA - as I had a good feeling after taking my A2 exams I rang them up to ask if they've ever taken an IR student through adjustment, and the words she used were 'never in living memory'. (So I took a gap year and reapplied ofc, I wasn't gonna take no for an answer haha)
So I wouldn't get your hopes up about adjustment, given their response to me
Hope this helps