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Other equity reserves (Details) - EUR (€)
€ in Millions
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Other equity reserves      
Total share based payments reserve € 31.0 € 32.0 € 29.0
Treasury reserve 0.0 0.0 0.0
Total cash-flow hedge reserve € 211.0 € (111.0) € 275.0