The only diptych in Lost Illusions, Classroom draws from an educational poster Lewis first saw while studying at horticultural college: a sprawling diagram of life on Earth in which scale collapses into fantasy. In Lewis’ version, every species depicted has disappeared from contemporary Britain, whether through extinction, habitat loss, or human intervention. Insects, fungi, flowers, birds and mammals coexist in a fabricated ecology composed entirely of what can no longer be found.

Seductively painted in candy pinks and butter yellows, the panel on the left depicts this surreal scene as pastoral and almost Edenic. Upon closer inspection, its darker undertones become visible: an extinct black-veined butterfly nosedives towards the Earth and certain extinction, and traces of contemporary life - a spent condom, cigarette and miniature whisky bottle - litter the hectically green grass at the bottom. A second, narrower panel to the right acts as a nocturnal foil, illuminated only by moonlight. Taken together, the diptych acts as a physical reflection of British Summer Time; longer days and shorter nights.