He even musters scant vigour as the play's truth-telling enemy of hypocrisy. Claire Price's Roxane, sweetly simpering and vacuous, takes to Zubin Varla's Christian like a reluctant duckling to water.
When he dies in battle her grief knows strict limits. The saturnine Varla is spectacularly miscast as the handsome Christian, a man whose surface appeal conceals depths of emptiness.
Varla's charms are nonexistent, his ardour minimal. The play's finale, a triumph of bitter irony, when the dying Cyrano reveals the truth about his feelings, normally leaves even the flintiest heart affected. But not on this occasion.
Derek Mahon's version of the play is no match for the witty, soaring eloquence of Anthony Burgess's adaptation for the RSC production with Derek Jacobi 20 years ago.
It plunges the action into an anachronistic No Man's Land, rather akin to the First World War, where 21st-century yob-speak and decorous rhyming couplets are rudely yoked together. For the first time since Nicholas Hytner triumphantly took over, the National veers wildly off-form.