it's a sedum. maybe the one called Cape Blanco (or something like that) they like sun and good drainage. Have yours got that?
yes Solanum dulcamara, sometimes called bittersweet.
I expect it's poisonous but it's not the one known as deadly night shade, that's Atropa belladonna.
Stachys sylvatica, Hedge woundwort. should have a rather rank musty smell when you pullit out
sweet william leggy but upright which mine are not now I've removed their supporting weeds
Alchemilla mollis, (Ladies mantle) and Sweet William
weed or not is just about whether or not you like it. Some will tell you it is a weed.
I don't know the difference.
I had a bit of a drool as well
I can't see many leaves on there, mine are all well leafed when they come into flower. What are everybody else's like?
Having got my white one I'm now lusting after a pink one
I prune them by cutting a few older stems back to base occasionally. Don't shorten the stems, it looks awful
if it's got a strong musty smell to it, that's Hedge Woundwort, Stachys sylvatica