The 'Rottweiler of radio' broadcasting legend John Humphrys talks to @StephenNolan

The late Robin Cook said a morning clash with our guest this morning was the "only thing" that kept him awake at night. For 30 years this year, he's been grilling politicians on Radio 4's Today programme with a style that's been described as "grumpy, thumping, baiting and biting". It's the "Rottweiler of radio" - John Humphrys.