There are two fairly recent interviews with Alex on-line.
Theatre.com has an interview with both Alex and Simon Russell Beale talking about their careers. They talk about being associate artists at the National Theatre:
Alex: "And then you can do script meetings as well, which is really good to do, but it’s hard. I can’t judge a script for love or money. I quite like to go, though, because I think it’s good to have an actor’s take on things represented sometimes, but having said that, I’ve not been for ages."
Simon Russell Beale on Alex and Nick Hytner working together:
"There was a very funny moment when Alex did something and said, ‘That feels a bit…’ And Nick went, ‘Yeah!’ And I had no idea what they were talking about, but they knew exactly what each other meant."
On being an expert:
Simon: "You know, Alex is an expert as well."
Alex: "Yes, on theatre history. I write pieces for the Dictionary of National Biography."
Alex: "I would love to have done The Music Man, but I’m too old for it now. But I love to think I could do Sweeney Todd one day, but I don’t know—I keep thinking I have to start work now."
The full interview: Theatre.com
In a Time Out interview he talks to Jane Edwardes about the Alchemist, working with Simon Russell Beale and a year away from the stage:
"He used to say that he was too noisy for the box and he didn’t know how to do it, but after appearing as a surprisingly inscrutable George Bush in ‘Stuff Happens’ at the National, he decided to turn down all theatre offers for a while and waited to see what would happen.
‘For the first few months I thought: Oh God, what have I done? Why didn’t I stay where I’m wanted? But then things did get better, perceived blacklists didn’t exist, and I did some episode television and a thing about the Ballets Russes in which I played Diaghilev. Then a tiny bit in “Babel” in which I got to go in a helicopter with Brad Pitt and Cate Blanchett, and Prince Charles in “The Queen” [he gets a definite thumbs-up for this from our own Film section]. I do feel I’ve made advances over the last year and I’ve been quite pleased with some of the things I’ve done. Some of it’s been very seductive and hasn’t really felt like proper work.’
What he hasn’t missed away from the theatre is the build-up to the press night, particularly acute in this instance when anything short of a triumph will be seen as a failure. He and Beale have tried to cope by writing their own reviews: ‘How disappointing to see…’; ‘We were looking forward to this so much, what a shame…’; ‘Expectations were not realised…’"
Full interview: Time Out