The message
from "Sue & Bob Hobden" contains these words:

What I'm worried about is if the Cavendish Banana, throughout the world, is
being overrun by this fungus, and other things, won't it be a pool for
infection of other varieties. A global breeding ground for diseases of Musa.
Fungal spores are airborne too, so with the acreage under cultivation
nowhere will be completely safe.

A bit like the problems now encountered by us outdoor Tomato growers with
Potato Blight.

Not really, because potatoes and tomatoes are both grown all over the
UK; unlike Cavendish bananas. Its unlikely that airborne tropical fungal
spores from commercial banana acreage in the tropics, will reach here;
or survive.

Janet