On your UCAS hub it should tell you whether or not you have received a contextual offer. They will have emailed you if this is the case also. I applied to Loughborough for psychology this year and below is my offer (I am a contextual applicant myself).

Have you been made a contextual offer? If you have, you will only need BBC to get into your course for certain (or whatever grades it asks for on UCAS). If you have not, you will need the usual requirement of ABB.
If you are contextual, they will manually select and re-review your application if you achieve lower than BBC
If you are not contextual, they will manually select and re-review your application if you achieve lower than ABB
Loughborough do not appear to use UCAS tariff points so you'll need to at least ABB and A*AC would not count for this, so you'd be reviewed.
You have said your course requirement is ABB. So from this I have gathered you're a non-contextual applicant so if this is the case please
ignore the contextual offers completely. They are not something you should concern yourself with since they are only relevant to applicants other than yourself. If not, they will review you and from the tool on UCAS hub you can see that it is more likely than not that you will get in with A*AC anyway - however you should
aim for the grades the university has asked for on your UCAS offer. Try not to worry about this too much!