In the week that he revealed his dramatic proposal to overhaul the Vatican’s media operations, the former chairman of the BBC Trust talked to Hannah Roberts As thE DIPLOMAT who oversaw the handover of Hong Kong from Britain to China in 1997, he is expert at the navigation of regime change and the defusing of culture clashes. But perhaps someone more familiar with one of the Vatican’s largest and most labyrinthine divisions might have worried that a call to plot its passage into the twenty-first century would turn out to be a poisoned chalice.Not so Lord (Chris) Patten, former chairman of the BBC Trust, who last summer agreed to head up the committee exploring the reform of the Holy See’s media operations. In March, its report went to the so-called C9 – the council