The message
from "rmw" contains these words:

Hi All,
yes it is true that the planarian came to England in a pot plant from New
Zealand. it was in the news at the time, but I do not know if they found a
cure for it. hope this helps you.

Richard M. Watkin.

It`s also not quite the death to all earthworms as we did the same back
and there`s more of our earthworms in NZ than Flatworms in England.