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Employee benefit expense - Monthly average number of people employed by the Group (Details) - employee
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Employee benefit expense      
Processing and service delivery 47,387 38,256 34,163
Sales and marketing 7,501 5,993 5,400
Administration and overheads 8,663 7,226 6,468
Monthly average number of people employed by the Group 63,551 51,475 46,031