Rob Callender only graduated last year, yet his portrayal here of flighty Bennett potentially propels him to the stardom of his equally unknown predecessor in the original production, Rupert Everett.

However this exposé of public school life tells us nothing we don’t know already. Perhaps it wasn’t passé in 1981 to out adolescent boys’ fumbling in the dark to sorry consequences, and parody the hierarchy of the establishment with prefects lording it over first years who cry themselves to sleep until they can do the same.

Julian Mitchell says he set out to explore why Oxbridge chaps became spies; he wrote the play in 1979 when Anthony Blunt was exposed. Reviewers make much of this point, it’s a useful marketing tool, but it’s like searching for a needle in a haystack to find any answers on stage.

Judd’s lofty idealism is heart-warming, if difficult to sit through sometimes, but his speeches are dampened by disappointment; the past is not as foreign as they make out. We know Communism didn’t work, and the last bastion of socialism that was Tony Benn has unfortunately passed. What next?

Even Mitchell isn’t convinced. In the programme: ‘Will it always be so? Looks like it.’