This grower is sure of this plant identification.
Maurelii variety. The Red Abyssinian banana. Not hardy, (although it may come through winter outside if protected) but a "must have" plant. Huge purple and green leaves. Keep damp and well fed for the most colourful leaves. Height up to 3m.
Abyssinian banana, Ensete, Ethiopian banana
Ensete ventricosum (Abyssinian banana). An upright, palm-like evergreen perennial native to tropical Africa. Bears red-green, spoon-shaped leaves. grown for its showy inflorescence which are droopy spikes of red bracts in late spring. The fruits are banana-like but are not edible.