What grades should I tell my 6th form interviewer?

Hi, so I got an interview at a 6th form this Wednesday. I thought it was going to be in the New Year. So, I was going to give them my December mock results, but no. They responded after one week and gave me an interview this Wednesday. I don’t have any yr10 mock grades and my predicted are worse than what I actually get. So, wtf do I tell them?