As always, many thanks to all my blogging friends who were quick to come up with the names.
This one seemed to be the Field Sow-Thistle (Sonchus arvensis)
This one is the butterfly bush (buddleja asiatica), that attracts of 'hordes of butterflies'
The lemonia (ravena spectabilis), which has a curious flattened appearance and is said to be a 'great butterfly attractor'.
This is the clerodendrum paniculatum or the pagoda flower