Hello again, Ricardo. You have a fine bed of weeds there including some real sods ;-) Personally I'd start again since it's such a tiny bed. Dig out the iris, poppy and primroses. Wash off their roots to make sure there is no scrap of weed stem, root or bulbil left on them. Set them aside packed together in a bucket or box or something. Keep them damp but don't let them sit in water. Then dig out the soil from the bed at least six inches, shove it in a sack and take it to the dump. Check there are no roots left behind. I would very rarely advocate doing this because I'm a low intervention gardener but I just don't think it's worth trying to get out the Oxalis, dock, enchanters nightshade and maple seedlings you have in that area. Replace the soil in the bed with a sack of something labelled topsoil from Homebase or wherever. Replant your plants. Honestly though, if you have Oxalis in a typical small back garden you'll always have it. It's a constant battle. To me the enchanters nightshade is worse because it grows taller. The dock can get big but is pretty easy to get rid of as long as you remove the whole root.