If there is a problem with this wonderful production, it rests with the casting of Anna Maxwell Martin as Sally Bowles. As Sally, Martin is a fresh faced suburban girl but talk about her career as a nightclub singer is laughable because of her obvious lack of singing talent. I cannot believe that Rufus Norris did not do this intentionally. Sally Bowles is shallow and selfish but where do you go with a West End musical where the lead has a weak singing voice and is ineffectual and dislikeable?