Thank you for your replies
So I tried him in the playpen bin and the first time he hated it, he ran all along the sides with his belly rubbing against the plastic sides, trying to jump out, and he was squeaking constantly which I have never heard him do before! I put his ball in and he jumped straight into it and I put him back into his cage. There was bedding on the ground and a few chews and treats, I'm not sure why he was so scared!
But I tried again last night and he was much calmer. He ate for quite a while and let me stroke his back and as soon as I saw him pacing the sides I put his ball back and he jumped straight in again haha.
So if he is okay tomorrow night I will finally try and scoop him up!