cobra french beans planted out too soon?

[Two_Sheds]

the leaves are yellowing badly and then going brown, shrivelling etc....
I guess I planted these out about a month too early?

Yep! but you learned that now, so it's onwards and upwards. Some people would just give up, not understanding what went wrong

I cant believe the cold/wind can cause so much damage so quickly...

The wind is even more drying than hot sun: the leaves lose moisture must faster than the roots can take it up, hence they dry out (dessicate) and turn papery and dead.

Cut off the damaged ones, and more should come when it's warm enough

My experience with French Beans is they're always looking for a reason to die!

If you treat them like runner beans, perhaps.

They like warmer, drier weather than runners do, so give them that and they're happy. They grow themselves over here in the cereal belt (dustbowl) of E. Angular

[redser]

8 more just sown in pots!!!! I have no more seed left now!!!!

Cobra gives huge yields 8 plants will give you bags full if the plants do well. You might consider cutting your failed plants down to just above a set of leaves. New shoots should emerge.