Nipplewort

I think this is Nipplewort, Lapsana communis. It crops up all over the place.

Geum urbanum: Wood avens or Herb Bennet

This plant has suddenly appeared in the garden this year. I let it grow to see what it was, and it seems a typical example of Geum urbanum (Rosaceae family), except that a couple of the shots here show six petals which seems unusual.

Garden shrub Tamarisk

I’m not sure exactly what type of Tamarisk this is, but it’s a name I regularly forget. It's currently in full flower. Pruning soon after flowering and then leaving it to grow new shoots will ensure a good display of flowers the following spring/summer on the new growth. If you don't prune, it will grow more to a tree size.