16. TRADE AND OTHER RECEIVABLES
 
  2019 
R’m 
  2018 
R’m 
 
Trade receivables  3 332     3 277    
Less: Provision for expected credit losses (2018: provision for impairment of receivables) (220)    (239)   
Net trade receivables  3 112     3 038    
Other receivables  635     598    
Prepaid expenses  176     125    
Balance at 30 September  3 923     3 761    
Reconciliation of provision for expected credit losses¹ (2018: provision for impairment of receivables)            
Balance at 1 October  (239)    (247)   
Adjustment upon adoption of IFRS 9  20     –    
Restated balance at 1 October 2018  (219)    (247)   
Provision raised  (19)    (33)   
Debt written off  18     41    
Balance at 30 September  (220)    (239)   
1 Refer note 31 – risk management (credit risk).        
The carrying amounts of the trade receivables include some receivables balances in Alliance Medical which are factored on a full recourse basis, and hence which the Group continues to recognise in their entirety in the statement of financial position. The amount repayable under the factoring agreement is presented as a secured borrowing in note 21.