Lowland mesophile hay meadows of the British Isles and western France rich in, or dominated by Arrhenatherum elatius accompanied by Dactylis glomerata and Holcus lanatus with Centaurea debeauxii ssp. nemoralis (Centaurea nigra, Centaurea nemoralis), Rhinanthus lanceolatus, Oenanthe pimpinelloides, Gaudinia fragilis, Linum bienne, Brachypodium pinnatum.