The message
from "Andy Sanson" contains these words:

Any hypnotists out there who would like to persuade the population of the UK
that bindweed and nettles are the basic ingredients of the elixir of life so
that together, with your skills and my garden, we can make a fortune?

Nettles already are an elixir of life, not least to caterpillars,
which miraculously turn into butterflies. They also make wonderful
fertiliser for your garden, compost activator, treatment for rheumatism;
plus you can eat them (vitamin and iron rich), and weave a very fine
cloth from their fibre.

Bindweed is probably equally useful, we just haven't recognised its
potential yet.

Janet.