It really is difficult to call one way or another.
Louise is claiming George was demanded for the rehearsal. We know that is wrong. Neil and Vince stood in during the rehearsal.
It is claimed that George made an appearance at the end of the afternoon. Part of that is based on what they are wearing, with the most distinctive bit of dress being Ringo's black/dark shirt.
However, if you look at the rehearsal photographs I posted, the later rehearsal on the 8th - with Vince holding George's guitar, show Ringo in white shirt and tie.
I will admit I don't know, and the ...