Mia Koso-Thomas is Group Head of Payments & Financial Transactions Legal at Entain plc, a global FTSE 100 gaming and entertainment group. She leads the company’s global payments legal function, advising across multiple markets on complex financial transaction and regulatory matters. With over 25 years’ experience in financial services and payments, Mia has held senior legal roles at organisations including American Express, Post Office Money, Mastercard, and Paysafe. She specialises in digital payments, fintech, and regulatory compliance, bringing deep expertise in strategic partnerships, innovation, and governance across the global payments ecosystem.