The recoverable amounts of the cash generating units are assessed using either a fair value less costs of disposal model or a value in use model. Value in use is calculated as the net present value of the projected risk-adjusted post-tax cash flows plus a terminal value of the cash generating unit to which the goodwill is allocated. Initially a post-tax discount rate is applied to calculate the net present value of the post-tax cash flows. The discount rate used is based on the Group WACC of 7%, as most cash generating units have integrated operations across large parts of the Group. The discount rate is adjusted where appropriate for specific country or currency risks. Fair value less costs of disposal is calculated using a similar discounted cash flow approach. A post-tax discount rate is applied to the projected risk-adjusted post-tax cash flows and terminal value.
The valuation methodology uses significant inputs which are not based on observable market data, therefore, this valuation technique is classified as level 3 in the fair value hierarchy