Interesting grouping. The B&W photo was difficult to sign so they signed a pink piece of paper likely from an autograph book. From what I can see the George and John on the photo might be genuine however the pink slip is definitely the work of Neil Aspinall.
Here are a couple of close ups of the signatures on the photo. Not the best quality but may help.
I actually think these have a shot at being genuine - the pen obviously didn't take to the photo well. Even if they are legit, it could be hard to get them authenticated due to the poor quality.