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Expenses by nature (Details) - GBP (£)
£ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Expense by nature    
Related party administrative expenses £ 42  
Total administrative & research and development expenses    
Expense by nature    
Total administrative and research and development expenses 51,808 £ 42,862
Research and development expenses    
Expense by nature    
staff costs (excluding share-based payment expenses) 11,882 6,689
Research and development consultancy 7,449 7,936
Research and development components, parts and tooling 8,169 4,771
Total expenses by nature 27,500 19,396
Administrative expenses    
Expense by nature    
staff costs (excluding share-based payment expenses) 5,547 5,736
Share based payment expenses 7,056 7,294
Consultancy costs 1,340 990
Legal and financial advisory costs 1,125 1,476
IT hardware and Software costs 3,085 1,665
Related party administrative expenses 42  
Insurance and premises expenses 1,913 2,119
Other administrative expenses 2,883 3,157
Expense on short term leases   8
Depreciation expense 412 260
Amortisation expense 578 572
Depreciation on right of use property assets 327 189
Total expenses by nature £ 24,308 £ 23,466