Cheers - Unfortunately, there is too much to sensibly hand pull. I have tried that. I read up that it is an annual, so what I have done is strim it close to the ground. Most plants are still in flower and only a few have gone to seed.
Hopefully I have caught it in time to keep the spread down and then I'll hand pull that area next year whilst then focussing on another paddock. I reckon I will have it cracked in four to five years.

Chris