The message
from Kay Easton contains these words:

Are they causing as much devastation as was expected? The furore seems
to have died down somewhat. They co-exist with earthworms in NZ.

Reportedly, they have not had the impact in the UK that was feared.
The HDRA website claims that a flatworm only eats two earthworms a week
and can go months between meals if none appear. Perhaps in summer when
earthworms are at their most active, flatworms are far more at risk from
hot weather or soil dryness, so are unlikely to multiply faster than
their food source?

According to the head gardener at Brodick Castle some have been
reported on Arran before, but they don't appear to have spread far. I
took our first one to show a meeting of the island's garden club..about
50 keen gardeners. None of them had ever seen an NZF before, and all had
plentiful supplies of earthworms in their gardens.

Janet.