Australia news live: Labor and Liberal parties prepare for judgment day in Dunkley byelection

Voters in the Melbourne seat head out to cast their vote, while revellers prepare for Sydney Mardi Gras

Good morning everyone - this is Cait Kelly and I will be with you for the next few hours. Let’s go through the big headlines:

Polls are now open in Dunkely, in Melbourne’s outer south-east. This byelection has been billed as a temperature check for the government - Opposition leader Peter Dutton has argued a swing of more than 3% would be bad news for the PM.