Woolworths Brad Banducci boss calls for certainty amid leadership speculation in Canberra

Woolworths shares have dived as much as 3.5 percent after the retailer said supermarket sales had slowed thanks to the phase-out of single use plastic bags. 

As he posted a 12.5 percent better profit of $1.7 billion, chief executive Brad Banducci called for certainty amid the leadership speculation. 

ABC's Peter Ryan says Mr Banducci warns the lack of certainty could harm consumer confidence.

Here's my report from The World Today.