Posted: 15/05/2014 at 19:45
You're right - it's a buttercup - it might not be the creeping type, but it's definitely a buttercup.
The first is definitely a honeysuckle - I've checked my books and to me it looks like Fly honeysuckle - Lonicera xylosteum - described in my Keble Martin as ',,,. Possibly native in a few woods on calcareous soils in Sussex, elsewhere bird-sown or escaped from gardens, rare. Flowers May. '
Not sure about the other two - I should know what the shrub is - it could be a snowberry but the picture goes a bit blurry when I blow it up.