Environet has enhanced their patented Xtract™ machine.

We have launched the third version, ensuring the rapid and reliable removal of Japanese knotweed from development and construction sites. This new machine substantially increases operational capabilities, reduces on site set up time and increases the process flow rate.

One hears lots of horror stories about Japanese knotweed damaging property, but I have to say in 20 years of being in this game I've never seen anything as spectacular as this photo. 

If your company has incurred costs in remediating land affected by Japanese knotweed you may be able to claim substantial sums of tax back from HMRC.