On 26/04/2011 00:23, Stewart Robert Hinsley wrote:
Seen at the top of a quarry face growing with Geranium macrorrhizum,
Lysimachia punctata (I think), Meconopsis cambrica and Narcissus, so I
suspect that it's a throwout.

http://www.stewart.hinsley.me.uk/Images/Corydalis.jpg

But which one is it? I thought it was going to be Corydalis solida or
Corydalis cava, but the foliage doesn't match.

I don't think it's Corydalis, but Dicentra formosa.