Former Prime Minister Tony Abbott has slammed Anthony Albanese over a “shocking failure of leadership” after the Prime Minister was kept in the dark over an alleged anti-Semitic terror plot in Sydney.

The NSW Premier has vowed no stone will be left unturned after a “deeply distressing” spate of alleged hate attacks across Sydney.

A policing expert says authorities had no need to tell the prime minister about an investigation into a caravan that was found packed full of explosives.