A little research shows I was more right than I realised. It turns out that Hunt was a member of the Cambridge Footlights alongside such figures as David Mitchell and Robert Webb.
Tim Walker mentioned those days in the Daily Telegraph last November:
Still, if the shadow education secretary looks back with a dreamy sense of nostalgia on his days performing in the Footlights at Cambridge with David Mitchell and Robert Webb, his erstwhile co-stars would appear to see things differently. “Tris wasn’t reliably funny in those days,” Webb says, tartly.He must have fitted in rather well then.
I also suggested that Hunt resembles Hugh Dennis's better looking younger brother. Sure enough, they went to the same (extremely expensive) school.