I just watched all four parts and found it highly interesting - the biography of Rattigan as well as, er, the presenter.

And don't know any of Rattigan's plays but "Ross". It wasn't mentioned although it's quite interesting as it deals with the last year in the life of T.W. Lawrence, the famous Lawrence of Arabia. He lived as a common soldier under a false name in the army and didn't want to be associated with his former life as a hero of the desert. He was probably homosexual and masochistic and it's quite interesting that Rattigan wrote this play about him. I was surprised they didn't mention it in the documentary.
As for the school: the boyfriend of a friend of mine went to Eton and we visited him there. It was a totally strange world, something you don't get anywhere but in England. They had to wear their uniforms when going into town and always had to put on a waistcoat, no matter what colour and design, but waistcoat it had to be. Usually visitors are not allowed in the school buildings but he took us there and the boys were quite excited to have real girls there . They drank quite much I remember but had to study very hard as well.
As for Benedict: that's what I really like about the documentary. There's so much of him in it and quite personal views as well.

For anyone interested in the life of T.E.Lawrence (Lawrence of Arabia) I would recommend his autobiographical work 'The Seven Pillars of Wisdom'.

Oh you lucky thing. Despite his weaknesses/faults he is a man for whom I have a lot of admiration.

I watched it today. Amazing what I already learned or started to be interested in because of Benedict.
To find out something about Benedict's time at school or his first acting experiences and influences in this documentary connected with the life story of Rattingan was really interesting.

Yep.it was fascinating and he did it well.