16. Trade and other receivables
 
2020 
R'm 
   2019 
R'm 
  
Trade receivables  3 616     3 332    
Less: Provision for expected credit losses  (403)    (220)   
Net trade receivables  3 213     3 112    
Other receivables1, 3  601     635    
Prepaid expenses  232     176    
Balance at 30 September  4 046     3 923    
Reconciliation of provision for expected credit losses2 
Balance at 1 October  (220)    (239)   
Adjustment upon adoption of IFRS 9  –     20    
Restated balance at 1 October  (220)    (219)   
Recovery of amounts previously provided for  4     –    
Expected credit losses raised  (186)    (19)   
Debt written off  33     18    
Effect of foreign currency movement  (34)    –    
Balance at 30 September  (403)    (220)   
1 While other receivables are also subject to the impairment requirements of IFRS 9, the identified impairment loss was negligible. The provision was calculated using a simplification of the general provision method.
2 Refer note 31 – risk management (credit risk).
3 Other receivables consist of a number of insignificant balances. The largest balance relates to accrued income relating to the international operations.

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 20.