<p>This is growing alongside a stream in Somerset.
About 4 inches tall, I couldn't see any leaves associated with it.
</p>
The only thing I can find looking similar is Bistort, but this is too far south and too early.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/66176388@N00">Mark Robinson</a> from Williton, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/66176388@N00/443719294/">ID Please</a>