flanagaj said..
I can fly Virgin to Singapore and get to take sports gear for free and pay for an additional bag at a nominal amount.
Be careful about code share, if you fly virgin but its actually Singapore airlines, then your stuck with Singapore airlines allowance which the last time I looked was not good.
The best way, to get windsurf gear from London to Australia, is London to Sydney with Virgin, (via hong kong), but then your a bit far from perth...
But depending on your plans a diversion with a domestic flight might be the cheapest option.
Qantas, are now much better for international, as they no longer seem to code share with BA (who will not take windsurf gear), and baggage policy seems much better now they have teamed up with emirates.
Emirates and Qantas are both good if you can live with 30kg, especially if your traveling with someone else. I managed to get two boards, three sails just on 30kg, in my double bag that I had made for myself.