Two years into his second coming at the BBC, where he sits atop a vast media organisation employing more than 18,000 people and deploying an annual budget of £5bn, Hall wears the cares of office lightly. His in-tray may be groaning with the most colossal to-do list, from the repurposing of the corporation for the digital age to the looming renegotiation of its licence fee (a fraught political discussion that will determine whether the BBC has a future in its current form at all).