In article , sacha
writes
I may be wrong but I was certainly under the impression that it was
notifiable.

It is - along with Japanese Knotweed - there is info about it on the
defra site.
--
Jane Ransom in Lancaster.
I won't respond to private emails that are on topic for urg
but if you need to email me for any other reason,
put jandg dot demon dot co dot uk where you see deadspam.com