This cheerful little plant is Bidens. I’d heard Carol Klein say that although most people think it’s an annual, used in pots and baskets, it is actually perennial. The surprise is that this one seeded itself into a pot outside the kitchen door, has been flowering for a while and is still going, in spite of the frosts we’ve had.
Another surprise is an antirrhinum covered in buds. I pulled up the rest ages ago but left that one because it looked so healthily green. Will it flower?