Thank you. I am aware—we've exchanged a great deal of correspondence and also in this Chamber around this issue. The establishment of the psyllid has proved difficult due to overwintering pressures and also predation. We've had seven years of feed trials and there's no discernible evidence to suggest a negative impact on Japanese knotweed. So, the trials have been paused in Wales whilst the Centre for Agriculture and Biosciences International conduct further investigations on establishment.

In terms of pesticide use, researchers have concluded glyphosate is the only current systemic herbicide that is successful at treating knotweed and, again, the researchers state eradication in the short term is not possible, but control can be achieved if you use it for three years of the minimum amounts, as highlighted in their research.