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Financial instruments - fair values and risk management - Summary of Tabular Form of Financial Assets and Financial Liabilities at Carrying Value and Fair Value (Details) - EUR (€) € in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | [1] | Dec. 31, 2021
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Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | € 581,780 |  | € 485,302 |  |  |
Regulatory deposits | 13,015 |  | 11,951 |  |  |
Loans receivable | 853 |  | 95,809 |  |  |
Derivative financial instruments | 272 |  | 0 |  |  |
Investments in non-listed equity instruments |  |  | 174 |  |  |
Prepayment for sportsbook software | 112,594 |  | 0 |  |  |
Trade and other receivables | 60,281 |  | 97,158 |  |  |
Restricted cash | 8,703 |  | 38,287 |  |  |
Cash and cash equivalents | 372,882 | [1] | 241,923 | [1] | € 254,778 | € 293,798
Fixed term deposits | 13,180 |  | 0 |  |  |
Total financial assets | 581,780 |  | 485,302 |  |  |
Financial liabilities, at fair value | 415,410 |  | 307,069 |  |  |
Lease liabilities | 70,360 |  | 29,145 |  |  |
Derivative financial instruments | 2,195 |  | 44,656 |  |  |
Deferred and contingent consideration | 368 |  | 2,714 |  |  |
Interest-bearing loans and borrowings | 36 |  | 87 |  |  |
Trade and other payables | 218,812 |  | 162,875 |  |  |
Customer liabilities (at fair value through profit/loss) | 51,108 |  | 67,592 |  |  |
Dividends payable | 72,531 |  | 0 |  |  |
Total financial liabilities | 415,410 |  | 307,069 |  |  |
Net, Carrying Amount | 166,370 |  | 178,233 |  |  |
Net, Fair Value | 166,370 |  | 178,233 |  |  |
Lease liabilities |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 70,360 |  | 29,145 |  |  |
Derivative financial instruments |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 2,195 |  | 44,656 |  |  |
Deferred and contingent consideration |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 368 |  | 2,714 |  |  |
Interest-bearing loans and borrowings |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 36 |  | 87 |  |  |
Trade and other payables |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 218,812 |  | 162,875 |  |  |
Customer liabilities (at fair value through profit/loss) |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 51,108 |  | 67,592 |  |  |
Dividends payable |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial liabilities, at fair value | 72,531 |  | 0 |  |  |
Regulatory deposits |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 13,015 |  | 11,951 |  |  |
Loans receivable |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 853 |  | 95,809 |  |  |
Derivative financial instruments |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 272 |  | 0 |  |  |
Investments in non-listed equity instruments |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value |  |  | 174 |  |  |
Prepayment for sportsbook software |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 112,594 |  |  |  |  |
Trade and other receivables |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 60,281 |  | 97,158 |  |  |
Restricted cash |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 8,703 |  | 38,287 |  |  |
Cash and cash equivalents |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | 372,882 |  | 241,923 |  |  |
Fixed term deposits |  |  |  |  |  |
Disclosure In Tabular Form Of Financial Assets And Financial Liabilities At Carrying Value And Fair Value [Line Items] |  |  |  |  |  |
Financial assets, at fair value | € 13,180 |  | € 0 |  |  |
[1] | Cash and cash equivalents at the year end includes unrestricted cash held for corporate purposes of €355.8 million and monies held for regulatory purposes of €17.1 million.

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