I think I know this family of plants, they're sedges aren't they and some of the bigger types are often found around ponds. These ones are very pretty albeit so small! I'm amazed at the great macro photography. They're sneaky little plants aren't they, trying to trick you like that.
I think it could be something similar that you mention. Do you have a photo?
Haha yea :D
The next walk I do, I'll take a photo for you, they do look very much alike but the ones I know grow about 30cm tall but look almost identical. Might be able to snap a pic tomorrow and send it through :)