it certainly looks like it and if you mean the site as you walk from devonshire road towards the under pass, it is. i know it well my mum lives across the road from it and it also appears in the front and the back of the house.

it is illegal to produce it and there are certain legal guidelines you have to adhere to if you want to get rid of it, and i think this is still the case. you cannot bin it, it has to be incinerated some how. if you would like it to stop it appearing then that can be very costly. i worked on a park project in north london where we had some knotweed, our budget was 100k and to deal with stuff professionally would have cost 50k, the procedure was to dig a few meters and take it out.

it is pretty much immune to poisons even the industrial stuff. i hope thats helpful and gives you some idea to the nature of the problem with it. it is fine in its native country thats why the victorians brought it over.