## Accounting Policies  | continued 

If circumstances arise that may change the original estimates of revenues, costs or extent of progress towards completion, estimates are revised. These revisions may result in increases or decreases in revenue or costs and are reflected in income in the period in which the circumstances that give rise to the revision became known by management. 

## Segment reporting – Note 1 

Operating segments are reported in a manner consistent with the internal organisational and management structure and the internal reporting information provided to the Chief Operating Decision-Maker who is responsible for allocating resources and assessing performance of the operating segments. 

## Share-based payments – Note 8 

The Group operates both Share Option Schemes and a Performance Share Plan. Its policy in relation to the granting of share options and the granting of awards under the Performance Share Plan together with the nature of the underlying market and non-market performance and other vesting conditions are addressed in the Report on Directors’ Remuneration on page 59. The Group’s employee share options and shares awarded under the Performance Share Plan are equity-settled share-based payments as defined in IFRS 2 Share-Based Payment . 

## Share options 

For share option awards, the Group measures the services received and the corresponding increase in equity at fair value at the grant date using the trinomial model (a lattice option-pricing model in accordance with IFRS 2). Fair value is determined on the basis that the services to be rendered by employees as consideration for the granting of share options will be received over the vesting period, which is assessed as at the grant date. The share options granted by the Company are at market value at date of grant and are not subject to market- based vesting conditions within the meaning of IFRS 2. 

The cost is recognised, together with a corresponding increase in equity, over the period in which the performance and/or service conditions are fulfilled. The cumulative expense recognised at each reporting date until the vesting date reflects the extent to which the vesting period has expired and the Group’s best estimate of the number of equity instruments that will ultimately vest. The Consolidated Income Statement expense/credit for a period represents the movement in cumulative expense recognised at the beginning and end of that period. The cumulative charge to the Consolidated Income Statement is reversed only where the performance condition is not met or where an employee in receipt of share options leaves service prior to completion of the expected vesting period and those options forfeit in consequence. 

No expense is recognised for awards that do not ultimately vest, except for share-based payments where vesting is conditional upon a non-vesting condition which is treated as vesting irrespective of whether or not it is satisfied, provided that all other performance and/or service conditions are satisfied. 

Where an award is cancelled, it is treated as if it is vested on the date of cancellation, and any expense not yet recognised for the award is recognised immediately. This includes any award where non-vesting conditions within the control of either the Company or the employee are not met. All cancellations of awards are treated equally. 

The proceeds received net of any directly attributable transaction costs are credited to share capital (nominal value) and share premium when the options are exercised. 

The dilutive effect of outstanding options is reflected as additional share dilution in the determination of diluted earnings per share. 

To the extent that the Group receives a tax deduction relating to the services paid in shares, deferred tax in respect of share options is provided on the basis of the difference between the market price of the underlying equity as at the date of the financial statements and the exercise price of the option; where the amount of any tax deduction (or estimated future tax deduction) exceeds the amount of the related cumulative remuneration expense, the current or deferred tax associated with the excess is recognised directly in equity. 

The Group has no exposure in respect of cash-settled share-based payment transactions and share-based payment transactions with cash alternatives. 

## Awards under the Performance Share Plan 

The fair value of shares awarded under the Performance Share Plan is determined using a Monte Carlo simulation technique and is expensed in the Consolidated Income Statement over the vesting period. The Performance Share Plan contains inter alia a total shareholder return-based (and hence market-based) vesting condition; accordingly, the fair value assigned to the related equity instruments at the grant date is adjusted so as to reflect the anticipated likelihood as at the grant date of achieving the market-based vesting condition. Awards are treated as vesting irrespective of whether or not the market condition is satisfied, provided that all other performance and/or service conditions are satisfied. 

## Business combinations – Note 31 

The Group applies the acquisition method in accounting for business combinations. The cost of an acquisition is measured as the aggregate of the consideration transferred (excluding amounts relating to the settlement of pre- existing relationships), the amount of any non-controlling interest in the acquiree and, in a business combination achieved in stages, the acquisition-date fair value of the acquirer’s previously-held equity interest in the acquiree. Transaction costs that the Group incurs in connection with a business combination are expensed as incurred. 

To the extent that settlement of all or any part of a business combination is deferred, the fair value of the deferred component is determined through discounting the amounts payable to their present value at the date of exchange. The discount component is unwound as an interest charge in the Consolidated Income Statement over the life of the obligation. Where a business combination agreement provides for an adjustment to the cost of the combination contingent on future events, the amount of the adjustment is included in the cost at the acquisition date at fair value. The fair value of contingent consideration at acquisition date is arrived at through discounting the expected payment (based on scenario modelling) to present value. In general, in order for contingent consideration to become payable, pre-defined profit and/or profit/net asset ratios must be exceeded. Subsequent changes to the fair value of the contingent consideration will be recognised in profit or loss unless the contingent consideration is classified as equity, in which case it is not remeasured and settlement is accounted for within equity. 

The assets and liabilities (and contingent liabilities, if relevant) arising on business combination activity are measured at their acquisition-date fair values. In the case of a business combination achieved in stages, the acquisition-date fair value of the acquirer’s previously-held equity interest in the acquiree is remeasured to fair value as at the acquisition date through profit or loss. When the initial accounting for a business combination is determined provisionally, any adjustments to the provisional values allocated to the identifiable assets and liabilities (and contingent liabilities, if relevant) are made within the measurement period, a period of no more than one year from the acquisition date. 

## Goodwill – Note 15 

Goodwill arising on a business combination is initially measured at cost being the excess of the cost of an acquisition over the net identifiable assets and liabilities assumed at the date of acquisition and relates to the future economic benefits arising from assets which are not capable of being individually identified and separately recognised. Following initial recognition, goodwill is measured at cost less any accumulated impairment losses. If the cost of the acquisition is lower than the fair value of the net assets of the subsidiary acquired, the identification and measurement of the related assets and liabilities and contingent liabilities are revisited and the cost is reassessed with any remaining balance recognised immediately in the Consolidated Income Statement. 

Goodwill applicable to jointly controlled entities is accounted for on the basis of proportionate consolidation and is therefore included in the goodwill caption in the Consolidated Balance Sheet, net of any impairment. The carrying amount of goodwill in respect of associates is included in investments in associates (i.e. within financial assets) under the equity method in the Consolidated Balance Sheet. 

Where a subsidiary is disposed of or terminated through closure, the carrying value of any goodwill which arose on acquisition of that subsidiary is included in the determination of the net profit or loss on disposal/termination. 

