If local councils or police are made aware of someone who's "acting unreasonably and persistently or continually acting in a way that has a detrimental effect on the quality of life of those in the locality" they can issue a community protection notice. These notices can be issued for a range of reasons including, noise nuisance, rubbish tipping and antisocial behaviour, however, they can also be issued for problems relating to invasive species like Japanese knotweed.
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Is It Japanese Knotweed?