The combination of Runner Beans and Nasturtiums seems to be working well on the allotment. The Runners are climbing and flowering nicely and the Nasturtiums make a useful (and colourful) groundcover and living mulch.
 Apparently Runner Beans were introduced to this country in Elizabethan times as an ornamental though they're now regarded as a crop. Similarly Nasturtiums are generally grown for their attractive flowers but the leaves, buds and flowers are edible.