There's an update.
EAs said vendor willing to find a specialist, just take some time to be addressed, since neighbor is involved.
But one week later, today I can see they put the property back to the market. I try to contact my EAs , but he is on annual leave.
I wonder how nasty they are, it seems the vendor now not willing to pay for it, just simply put it back to the market, hiding there's a problem of Japanese Knotweed to next people who may interested in her house.
Any one has opinions?