Could mean a lot of things. I know for sussex it'll be an offer for AAB if u put them as ur insurance and ABB if u firm them. ABB could be offered to students from difficult circumstances and AAB would be for everyone else.
So if I was only predicted ABB should i apply? Will they make me an offer of ABB?
You should definitely still apply because an offer is not solely based on grades Besides, you get to apply to five universities. Just make sure that if you get predicted ABB, you also apply to universities whose requirements are ABB xx