Can I cancel a property sale in light of new negative information?

Can I cancel a property sale in light of new negative information after i have been approved for my bond and signed the offer to purchase?

There is normally a clause that allows the buyer to cancel the agreement with the agent and seller in the event that something negative has come to light relating to the property. You must communicate this to agent and the seller you reasons for not proceeding with the purchase
When you decline the final offer received from the banks you will notify your consultant and they in turn notify the bank.