In the front of the Faber and Faber published script for Powell and Pressburger's The Life and Death of Colonel Blimp, before the screenplay itself, there is a series of fascinating letters from and to Powell about the film. Most of the letters are about the struggles to get it made, and in particular their battles with the British War Office; surprisingly to me, the film was quite controversial to many in the government as it was taken to be an affront or criticism of British morals (and morale?) during wartime.
At any rate, I highly recommend reading through this correspondence, which includes letters to and from Laurence Olivier - who was Powell's original choice for the protagonist who would ultimately be played wonderfully by Roger Livesey - and to actress Wendy Hiller. I found in particular the note to the latter to be quite amusing - and still inspiring and relevant.
"I must first of all, because we still don't know each other well, reaffirm our responsibility as independent film makers.
One, we owe allegiance to nobody except the financial interests which provide our money; and to them the sole responsibility of ensuring a profit, not a loss.
Two, every single foot in our films is our own responsibility and nobody else's. We refuse to be guided or coerced by influence but our own judgement.
Three, when we start work on a new work we must be a year ahead, not only of our competitors but also of the times. A real film, from idea to universal release, takes a year. Or more. [Or in my case, 12 - ed.]
Four, no artist believes in escapism. And we secretly believe that no audience does. We have proved, at any rate, that they will pay to see truth, for other reasons than her nakedness.
Five, at any time, and particularly at the present, the self-respect of all collaborators, from star to prop-man, is sustained or diminished, by the theme and purpose of the film they are working on. They will fight or intrigue to work ona subject they feel is urgent and contemporary, and fight equally hard to avoid working on a trivial or pointless subject. And we agree with them and want the best workmen with us; and get them. These are the main things we believe in. "