Doon Mackichan has spent her life causing offence and hilarity. The Day Today and Smack the Pony star tells Catherine Shoard why she relishes starring in a shocking Joe Orton playIt has been a while since Doon Mackichan was last hung, drawn and quartered for laughing at the suffering of children. There was a week in August 2001 when you couldn't pass a newsstand without seeing her handsome, sparrowhawk face, forehead…
