bˈɑːɹnɪt ɐpˈɪɹd ɪnðɪ ɚɹˈɪdʒɪnəl lˈʌndən stˈeɪdʒ pɹədˈʌkʃən ʌv ˈælən bˈɛnɪts tˈuː θˈaʊzənd fˈoːɹ plˈeɪ ðə hˈɪstɚɹi bˈɔɪz, æz wˈɛl æz ɪnðə nˈuː jˈɔːɹk, sˈɪdni, wˈɛlɪŋtən ænd hˈɑːŋ kˈɑːŋ pɹədˈʌkʃənz ænd ɹˈeɪdɪˌoʊ ænd fˈɪlm vˈɜːʒənz ʌvðə plˈeɪ.
Barnett appeared in the original London stage production of Alan Bennett's 2004 play The History Boys, as well as in the New York, Sydney, Wellington and Hong Kong productions and radio and film versions of the play.