Hi Mike. Yeah I was also told it is very common. I will wait until spring and see if I have any luck. After an initial survey along part of the coast, it seems that the majority of the weeds are now Cakile edentula, Cakile maritima and Raphanus raphanistrum. By the way, my name is Ganges and I am a PhD student at Victoria. No idea why my name is default as Victoria university though. Thanks for the information everyone.