0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Unaudited condensed consolidated interim income statement link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Unaudited condensed consolidated interim income statement - Alternative Calculation link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Unaudited condensed consolidated interim statement of comprehensive income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Unaudited condensed consolidated interim statement of comprehensive income - Alternative Calculation link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Unaudited condensed consolidated interim cash flow statement link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Unaudited condensed consolidated interim balance sheet link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Unaudited condensed consolidated interim statement of changes in equity link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Unaudited condensed consolidated interim statement of changes in equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Basis of preparation link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Segmental analysis link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Costs of services and general and administrative costs link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Ordinary dividends link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Earnings per share ("EPS") link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Analysis of cash flows link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Cash and cash equivalents and total borrowings link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Financial Instruments - fair value link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Related party transactions link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Reconciliation of profit before taxation to headline operating profit link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Events after reporting period link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Segmental analysis (Tables) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Costs of services and general and administrative costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Earnings per share ("EPS") (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Analysis of cash flows (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Cash and cash equivalent and total borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Financial Instruments - fair value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Related party transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Reconciliation of profit before taxation to headline operating profit (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Basis of preparation (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Segmental analysis - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Segmental analysis - Contributions by Reportable Segments (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Segmental analysis - Contributions by Geographical Area (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Costs of services and general and administrative costs - Summary of Operating Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Costs of services and general and administrative costs - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Ordinary dividends (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Earnings per share ("EPS") - Calculation of Basic and Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Earnings per share ("EPS") - Reconciliation Between Shares Used in Calculating Basic and Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Earnings per share ("EPS") - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Analysis of cash flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Cash and cash equivalents and total borrowings - Cash Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Cash and cash equivalents and total borrowings - Additional information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Financial Instruments - fair value - Fair Value of Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Financial Instruments - fair value - Analysis of Financial Instruments Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Acquisitions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Related party transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Related party transactions - Summary of Related Party Transactions Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Reconciliation of profit before taxation to headline operating profit - Summary of Reconciliation of Operating (Loss)/Profit to Headline Operating Profit (Details) link:presentationLink link:calculationLink link:definitionLink