"Runner Beans look like somewhat larger versions of what North Americans know as Green Beans or String Beans. There are a few differences, other than just size. Runner Beans are a perennial plant, whereas Green Beans are annuals. When the Runner Bean seed first starts to grow, the stem and the first set of leaves are the first thing to emerge from the ground. When a Green Bean seed starts to grow, the first thing to emerge from the ground is the two halves of the seed. Runner Bean vines twist clockwise, Green Bean vines twist counterclockwise."Its that transatlantic confusion again. Or maybe just a bean confusion. Its enough to drive anyone crazy. On the bright side, most sorts of green beans would work in the recipe.
http://www.cooksinfo.com/runner-beans