He was certainly that in all the shots I saw (and I've now watched it twice). In all the shots, you can see ground, so he was not above solid overcast.
No-one in that programme entered and flew in cloud.
Agreed PP, I commented that I thought he was IMC. I watched it again tonight with my son and in the shot I Thought was above cloud, I could see ground.
Apologies RMH.
I also have a great deal of reSPECT for the pilot and son act. Good viewing all round and actually portrayed flying as fun again.
RMH camping underneath the wing at Dornoch - very brave man.