In this day and age, the idea that someone would spy for Russia seems almost quaint but this is the subject of this double bill.

James Bond might still fight the Russian baddies, but the big bad Communist bogeyman has long gone.

An Englishman Abroad tells of when the actress Coral Browne met Guy Burgess in Moscow in 1958.

Burgess fled to Russia in 1951, to experience first-hand the Marxist regime for which he’d betrayed his country. He was a flamboyant personality, and Bennett’s play paints a lonely picture of his last 12 years living in a grey single-room apartment in Moscow.

In A Question of Attribution, Anthony Blunt is quite a different character. As surveyor of the king’s pictures, he became close to the Royal Family and plainly thought himself untouchable. He confessed to spying in 1964, but later resumed his academic activities and died in England in 1983.

Both men, very different, but united by their decision to become traitors, are beautifully realised in this production. James Clyde’s Burgess is still charismatic, but the impression is of a man slowly being crushed out of existence.

David Yelland’s mellifluous tones reveal Blunt as much more unpleasant, and his meeting with HMQ (Melanie Jessop) is rich with self-delusion.

Even if you don’t remember, just revel in the wit and linguistic gorgeousness for which Bennett is so rightly renowned.

It runs until November 6.