Ferns can be difficult to identify - often you need to see the shape of the spores. If I had to guess I'd say one of the Dryopteris but could be wrong.

Yes - closeups of the front and back of a frond, whole plant photo (which you have) and a description of any scales on the stalk are all necessary for ID. As that fern is just unfurling, there probably won't be any spores, so you'd have to wait a couple of months as well.

Try googling images of:
"Dryopteris affinis Cristata the King"

I don't think this is a cristate form - looks more as though the fronds haven't quite finished unfurling. If you look at the ones near the base they have plain tips.