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v3.25.2

Share-based payments - Movements in the number and weighted average exercise price of share options (Details) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2025 Options £ / shares | Dec. 31, 2024 Options £ / shares
2021 Incentive Plan |  |
Share-based payments |  |
Outstanding, start of period | 1,171,210 | 998,598
Granted during the period | 2,252,530 | 397,803
Exercised during the period | (61,524) | (128,369)
Forfeited during the period | (79,816) | (96,822)
Outstanding, end of period | 3,282,400 | 1,171,210
Weighted average exercise price, Outstanding, start of period | £ / shares | £ 0.91 | £ 1.2
Weighted average exercise price, Granted during the period | £ / shares | 0.09 | 0.4
Weighted average exercise price, Forfeited during the period | £ / shares | 1.27 | 2.97
Weighted average exercise price, Outstanding, end of period | £ / shares | £ 0.35 | £ 0.91
EMI Scheme |  |
Share-based payments |  |
Outstanding, start of period | 945,429 | 1,170,231
Exercised during the period | (6,184) |
Forfeited during the period | (42,621) | (224,802)
Outstanding, end of period | 896,624 | 945,429
Weighted average exercise price, Outstanding, start of period | £ / shares | £ 2.2 | £ 2.5
Weighted average exercise price, Exercised during the period | £ / shares | 1.8 |
Weighted average exercise price, Forfeited during the period | £ / shares | 11 | 3.8
Weighted average exercise price, Outstanding, end of period | £ / shares | £ 1.8 | £ 2.2

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