Wild flowers - Paglesham

I took some macro shots of wild flowers on Sunday.
I've only got a couple of books for reference so am not sure on the identification of a couple of these flowers.
The closest I could find to the purple flower (top left) is the Common Vetch.
I haven't got a clue with the pink flower (looks like one of the pea family in my book, but not a perfect match). The yellow flower is Birdsfoot-Tefoil or Bacon and Eggs (I just missed out on getting a photo of this with a common blue butterfly perched on it - would have been cracking!). The purple, yellow and green flower is Woody Nightshade (not Deadly Nightshade as it is normally mistaken for, apparently).
I'd be grateful for any enlightenment. Thanks Matt