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Expenses by nature (Details) - GBP (£) £ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Expense by nature |  |  |  |
Share based payment expenses |  |  | £ 3,207 | £ 4,785
Related party administrative expenses | £ 57 | £ 21 | 151 | 42
Total administrative & research and development expenses |  |  |  |
Expense by nature |  |  |  |
Total administrative and research and development expenses | 24,243 | 29,231 | 45,043 | 52,703
Research and development expenses |  |  |  |
Expense by nature |  |  |  |
Staff costs (excluding share-based payment expenses) | 8,336 | 6,844 | 15,324 | 12,680
Consultancy costs | 1,202 | 4,256 | 3,134 | 7,395
Research and development components, parts and tooling | 2,036 | 6,867 | 4,333 | 11,876
Total expenses by nature | 11,574 | 17,967 | 22,791 | 31,951
Administrative expenses |  |  |  |
Expense by nature |  |  |  |
Staff costs (excluding share-based payment expenses) | 3,195 | 2,331 | 6,050 | 4,687
Share based payment expenses | 2,063 | 2,856 | 3,207 | 4,785
Consultancy costs | 1,025 | 544 | 1,641 | 1,173
Legal and financial advisory costs | 1,063 | 717 | 1,781 | 1,771
HR advisory and recruitment costs | 627 | 229 | 822 | 349
IT hardware and Software costs | 1,906 | 1,819 | 3,767 | 3,407
Insurance and premises expenses | 592 | 33 | 1,178 | 152
Marketing costs | 433 | 696 | 585 | 774
Premises expenses | 414 | 566 | 902 | 1,144
Depreciation expense | 252 | 289 | 466 | 558
Amortisation expense | 51 | 263 | 107 | 536
Depreciation on right of use property assets | 202 | 157 | 360 | 326
Other administrative expenses | 789 | 743 | 1,235 | 1,048
Related party administrative expenses | 57 | 21 | 151 | 42
Total expenses by nature | £ 12,612 | £ 11,243 | £ 22,101 | £ 20,710

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- Definition The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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