Leases
Operating lease rentals are charged to the income statement on a straight-line basis over the term of the lease.
Assets held under finance leases, which transfer to the Group substantially all the risks and benefits incidental to ownership of the leased item, are capitalised at the inception of the lease, with a corresponding liability being recognised for the fair value of the leased asset or, if lower, the present value of the minimum lease payments. Lease payments are apportioned between the reduction of the lease liability and finance charges in the income statement so as to achieve a constant rate of interest on the remaining balance of the liability. Assets held under finance leases are depreciated over the shorter of the estimated useful life of the asset and the lease term.