Sainfoins (Onobrychis viciifolia) belong to the pea family (Leguminosae/Fabaceae). My trusted Collins Complete Guide to British Wildflowers tells me that these are generally found in dry, calcareous grasslands, which is exactly where I found these growing!
I bought myself a cheap and tiny macro attachment for the iPhone. While it was nice being able to photograph details of flowers using this, the quality is as to be expected – both by the camera on the phone and quality of the attachment. Nonetheless, I will be using this more when I don’t want to be lugging a camera with me on a walk