whats eating my runner bean leaves

Hi something is eating my runner bean leaves and having a real good feast on them... I thought at first its snails or slugs so put slug pellits down but they still seem to be eaten, even the really small leaves that are well over a foot off the round....4 out of 7 plants are still growing but they have all been eaten....

any ideas anybody as to what is eating the and what can I do ..Please !!!

I have thought of putting some white fleecey stuff over the to prevent what ever is eating them getting to them but then they wouldn't get any light..

I appreciate you have dismissed  slugs or snails but they are usually the culprit and snails will climb up the sticks-go out after dark with a torch and I think you will find something munching.

When you say you have used slug pellets have you renewed them after rain -are they scattered about and not in piles?

slugs and snails has eaten all mine in the garden. Its bean a total disaster!!!

The ones down the allotment are fairing slightly better - ie they are still there but not looking happy 

Little blitters hey... I have scattered the pellets all around them......silly question but will they still produce beans.....I now hope that the 'little darlings' get an attack of vertigo soon....
Thanks for your help

If they survive- then yes- you will still get beans- it is not too late to sow some more now -obviously a bit later to flower etc, but saves a glut

This year, as well as using garlic wash on my Hostas I've used it on other stuff which slugs/snails like beans, dahlias etc. They're not perfect but better than they've been before - as I don't use slug pellets

You would see some slime trails on the remaining leaves if it were slugs and snails.