Can confirm David Attenborough is lovely. I've worked with him and several friends have too. All said the same thing. It's a bit like working with god.
Lots of 'celebrities' make loads of demands on their rider. Ridiculous shit. (My favourite was the actress who insisted the ice cubes be made from a specific brand of water)
David Attenborough didnt ask for anything. Even when I was like we're getting you lunch. You can have literally anything! He just asked for a sandwich.
He took the time to chat to me about stuff. He's so knowledgeable. But also keen to share that knowledge. Honestly one of the best jobs of my life.