The Reserve Bank of Australia has restarted negotiations between the banks and Lindsay Fox’s Armaguard amid concerns the monopoly cash transport business could run out of money when its current lifeline expires, jeopardising the movement of coins and banknotes through the economy.

Armaguard was handed a $50 million lifeline until the end of June by the banks and major retailers last year on the assurance it would find ways to cut costs and streamline operations to make the business more viable.