v3.24.3
Material accounting policies information - Narrative (Details) - GBP (£)
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
 [2]
Jun. 30, 2021
 [2]
Disclosure of changes in accounting estimates [line items]        
Net assets £ 639,500,000      
Net current assets 113,800,000      
Cash and cash equivalents 62,358,000 £ 164,703,000 [1],[2] £ 162,806,000 £ 69,884,000
Loans and borrowings 144,754,000 0    
Grant received 707,000 494,000 [2] £ 139,000  
HMRC Enquiry        
Disclosure of changes in accounting estimates [line items]        
Research and development expense credit £ 18,500,000 18,500,000    
Severe downside scenario        
Disclosure of changes in accounting estimates [line items]        
Percentage increase (decrease) in revenue 20.00%      
Increase (decrease) in cash and cash equivalents £ 43,000,000      
Revolving Credit Facility        
Disclosure of changes in accounting estimates [line items]        
Undrawn borrowing facilities 205,200,000      
Loans and borrowings 144,754,000 £ 0    
Revolving Credit Facility | Severe downside scenario        
Disclosure of changes in accounting estimates [line items]        
Loans and borrowings 0      
GalaxE        
Disclosure of changes in accounting estimates [line items]        
Range of customer relationship values £ 2,400,000      
GalaxE | Customer attrition        
Disclosure of changes in accounting estimates [line items]        
Percentage of reasonably possible increase in actuarial assumption 1.00%      
Percentage of reasonably possible decrease in actuarial assumption 1.00%      
[1]
(1) Restated to include the effect of revisions arising from provisional to final acquisition accounting for DEK and Mudbath (refer to note 3C for details).
[2] (1)The presentation of the Consolidated Statement of Cash Flows has been changed to separately present the repayment of lease interest from the total repayments of lease liabilities