Thanks for your help
The problem is with these lines (as I'm on a saver fare) on international short haul
http://www.virginaustralia.com/au/en...nal-short-haul
If you are travelling on a Saver fare with only sporting goods you will be required to purchase a checked baggage allowance for each separate piece you are carrying. We advise you to pre-purchase baggage online or by calling our Guest Contact Centre. Baggage allowances added/bought at the airport will be charged at a higher fee.
If you are travelling on a Saver Lite fare with only sporting goods you will be required to upgrade to a Saver fare to receive a checked baggage allowance. This can be done at the time of booking or by calling our Guest Contact Centre.
which seems to contradict
Each item of sporting equipment represents one piece of checked baggage allowance, provided that it does not exceed the maximum size and weight limits.
I might phone then and get a comment in my ticket.....