Fern sp?

Fern sp?

Observation - Fern sp? - UK and Ireland. Description: Not sure what this is - found within a woodland, up against a sheer vertical rockface. Approx 40cm in length - plenty still in leaf so any ideas will be great - thanks.

Not sure what this is - found within a woodland, up against a sheer vertical rockface. Approx 40cm in length - plenty still in leaf so any ideas will be great - thanks.