Fellow Lancastrians Harrison Birtwistle and bass John Tomlinson talk about three-decades of creative collaboration, including the operatic roles Birtwistle, alongside librettist David Harsent, created especially for Tomlinson. The first was in 1991: the Green Knight and Bertilak in 'Gawain' and the second, the title role in 'The Minotaur' from 2007. But their collaboration goes back further still – to the recording of Birtwistle’s first opera in 1979.