Looks like my autumn fire sedum in the garden. Get orange-reddish flowers that dry to a neat red-brown when finished blooming.

Looks like Vicia cracca or something similar. If it is V. cracca, don't let it in your yard! I'm not familiar with the other species of vicia, so don't know if they're also an invasive plant.

That particular one is one of the Lace Cap Hydrangeas. If you want to grow them they are widely available in many varieties. But be warned. In many parts of the UK the flowers will not be blue like that but a muddy pink. You need acid soil to get that colour.

I would guess that this could be Claridge Druce. It is mixed in with another common, tough, work horse of the British garden, Lysimachia punctata.