Decoy1
Deeply Rooted
I don't quite understand the bean designations in the UK? Dwarf varieties and French runner beans are the two categories. I'm thinking these are bushes and poles?
In UK, P. vulgaris are often called French beans. Within French beans there are climbing beans (pole) and dwarf beans (bush).
The term Runner beans usually refers to P. coccineus.
The term ‘French runner bean’ doesn’t sound at all UK. Were you referring to Adam Alexander’s use of that term in his book or website?