Buttercups or Spearwort?
Introduction
The photograph on this page of Buttercups or Spearwort? by Anne Burgess as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Anne Burgess Taken: 5 Jun 2007
At first glance one would say that this is a field of buttercups. However a second glance, and a close look at the original image at full size, suggests that they are more likely to be Greater Spearwort, which is the largest and tallest buttercup-like flower to occur in the United Kingdom, and which actually prefers boggy ground like this hollow by the road. I should have paid closer attention at the time!
