17   CASH AND CASH EQUIVALENTS/OVERDRAFT
      2018 
R'000 
  2017 
R'000 
 
      Cash at banks  404 629     592 070    
      Bank overdraft  (248 877)    (5 619)   
         155 752     586 451    
      Cash at banks earns interest at floating rates based on daily bank deposit rates. Overdraft balances in South Africa incur interest at 8.3% (2017: 8.0%).             
      The fair value of the net cash approximates R155.8 million (2017: R586.4 million).             
      There are no restrictions over the cash balances and all balances are available for use.             
      In the 2017 financial year, property, plant and equipment to the value of R37.2 million in Datlabs was pledged as security for the bank overdraft of R5.6 million. Refer note 10.