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Cash and cash equivalents (excluding overdrafts) (Tables)
12 Months Ended
Dec. 31, 2022
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Summary of Cash and Cash Equivalents
     
All figures in £ millions
  
                2022 
   
                2021 
 
     
Cash at bank and in hand
  
 
269
  
 
 
660 
 
     
Short-term bank deposits
  
 
289
 
 
 
277 
 
     
 
  
 
558
 
 
 
937