what do you need to do after lillies have flowered and died

You don't have to, but you can if you want, if the foliage has died right back. You can either leave them in the pots, in which case you should have watered and fed them as they finished flowering, or you can put them in the ground.

They look neater cut back.

Mine are in the ground, what should I do with them?

If they've died back Ian, just cut them off to make them look neater. Don't need to do anything else....I leave a few inches sticking up so I know where they are......when they start to emerge again in the spring you need to watch out for slugs.....

Cheers Sid. I'll do that then. :~)))

Crumbs - that was fast!

so was that Lol :~))) anyway I thought you were sitting at the bottom of a tree with your mouth open?

Well I was, but then Someone shoved me out the way.... Anyway, my teeth were beginning to drop out.

Lol :~))