Tinkicker,
Re: hard evidence, I can go one better.
Check out
Brisbane, QLD - Daily Weather Observations
On the 14th, max wind gust was from the W at 59km/h, (the third highest for the month) and the 9am wind speed of 26km/h from the W was in fact the highest for the month.
Given that the aircraft was probably landing RWY 19 (although i'm not all that familiar with the surroundings at YBBN), that equates to a decent crosswind depending on actual wind speed at the time. Maybe someone can deduce the time of day from the shadows that the aircraft is projecting?
Now does this end the speculation?
TL