Thanks, Geoff for the reasurance.
I've just bought some new varieties for next year, the type which can be dried for eating but wanted to sow some of this years varieties next year too and didn't want to purchase them. Saving seeds is something of a learning curve, I was hoping for lots of seeds to swap but if there's a dozen seeds from each plant, I'll be happy.
Know what you mean about the weather, beans have done really well here though and as they grow up rather than taking up ground space are ideal for a small garden veg grower.