Leycesteria is another strong contender
we need more photos don't we.
i did wonder about one of the jasmines, Borderline, but can't see enough to be sure.
can you do a photo of the whole plant and the flowers and leaves just as they sit, with no hand to alter the natural shape of things?
those are pears and the leaves are pear as well
looks like sage to me. Most of them do flower eventually
they have floaty seeds, it probably arrived on the breeze.
Amazing things turn up, always worth watching what you weed.
Not nasty but possibly bigger than your usual weed. A seedling willow I think
Looks rather like Prunus padus, Bird Cherry, with those little fruits and the shape of the leaves
Sonchus arvensis or something similar.
Some people see Japanese Knotweed or Giant Hogweed in every plant they don't know.