Finance leases—Leases are classified as finance whenever the terms of the lease transfer substantially all risks and rewards incidental to ownership of the leased asset to the Group. At the commencement of the lease term, the leased asset is measured at the lower of fair value or present value of the future minimum lease payments and is depreciated over the lease term. The corresponding liability is recognized in the consolidated statement of financial position within borrowings. The discount rate used in the calculating the present value of minimum lease payments is the interest rate implicit in the lease. If there is no interest rate in the lease, the Group's incremental borrowing rate is used.