A Sense of History

Ihave just seen (most) of this on Film Four - missed the first few minutes. I recognised it instantly as a play I heard on Radio 4, 4 or 5 years ago. I was completely suckered into its premise then of a lovable old buffer reminiscing, whose ruthlessness and self-centredness gradually become only too apparent. I thought it was brilliant and funny and a pretty devastating critique of the English ruling class. I have been looking out for it ever since. So I was delighted to come upon the film which I didn't know existed till tonight. And the I found it was written and acted by Jim Broadbent and directed by Mike Leigh! That says a lot. However for some reason I didn't find the film so funny. The radio play was done as a memoir, just the character talking and somehow seemed more intimate, and the character so horrifyingly likable at first. I don't know if it was Jim Broadbent himself. I wonder if anybody else has heard the radio play and seen the film and has any comments. And who was the actor playing the Earl in the play? I would love to know if it was JB. Is the script available I wonder?