Mr Bean, one of our greatest comic exports, has an alter ego. The second Mr Bean, forename Richard, is the author of One Man, Two Guvnors, which thrilled audiences on both sides of the Atlantic. His latest play, Great Britain, dissects the corruption of power in parliament and beyond. The inevitable comparisons with The Duck House, which mocked the expenses scandal, are a little unfair, since the temperament and the intention of the two shows are vastly different.