Lots of leaves and few beans

[peanuts]

We have had a very hot and dry summer here in SW France.  Some things have done well, despite the heat (salad, tomatoes, sweetcorn best ever, with two full cobs per plant) with almost daily watering.  Thankfully we have a well, that has never dried up, and we pump from that and use a hose to put the water exactly where needed. 
Other veg have been weird.  Runner beans, and our precious, much-loved North Carolina Long Speckled Greasy Cut-Short beans (from Petra), have survived with daily watering. But they have made huge amounts of leaf growth, and very small harvest.  The NC beans, see photo, even now are only showing very few flowers, I can count the growing beans on two hands, but they have a ridiculous amount of leaves.  and that is from just six beans sown round each of these two wigwams!. Shame we can't be content with eating the leaves!
Has anyone else found  growing patterns weird this summer?

[galina]

No, they clearly got enough water.  Usually lush growth and few fruit is down to soil that is too rich.  Beans don't need a lot of fertiliser.  Could this have been contributing to the problem?