Does anyone know where I can buy "glass fibre" poles which can be used
instead of the usual bamboo canes, for
supporting runner beans (wigwam style).

Do you know if this type of pole would work properly. I would imagine
that these poles would be smooth and straight and might not provide
enough grip for the beans to get started.

I am about to relocate a hazel from where the squirrel planted it, and
plant it at the end of the garden. In a few years it will provide me
with bean poles for free.