Like a Large Dandelion!

Some self seeded plants have sprung up on the other side of my garden wall along a roadside and my neighbour and I have decided just to leave them as they are very colourful - now large seed heads have appeared like dandelions but much less inclined to blow away and the bees are having a lovely time on some of the flowers. (see extra)

Not being a plant expert I suspect some of them are wildflowers, I won't call them weeds, and some are probably garden flowers that have escaped.