v3.25.4
Inventories (Tables)
 12 Months Ended
Dec. 31, 2025
Texts Block [Abstract]  
Summary of Current Inventories
  All figures in £ millions
   
    2025
     
    2024
  
Raw materials
   
 
3
 
  
   5  
Work in progress
   
 
1
 
  
   2   
Finished goods
   
 
59
 
  
   63  
Returns asset
   
 
3
 
  
   4  
 
 
 
 
   
 
66
 
  
   74