We bought a few of these plants at a garden centre before the summer.
They've looked fantastic all summer and I was wondering whether we
should dig them up and keep them indoors for the winter or whether
they'll survive in the SW (Avon)?

If I should dig them up, do I need to do anything special to them. I
was intending on wrapping them up in newspaper and keeping them
slightly moist.

Cheers
Crom