At first sight I thought that Male Fern Dryopteris filix-mas was 2-pinnate but all the descriptions say that it is 1-pinnate with pinnatisect pinna. (In Hutchinson this is the same as deeply pinnatifid?, see previous post). This is because the individual leaflets are unstalked and they are therefore described as pinna segments as opposed to pinnules.
Any way Male Fern is one of a number of similar species including Mountain Male Fern D oreades and Scaly Male Fern D affinis (itself split into micro species). These may also hybridize with other Dryopteris species. This one was growing in woodland with D dilitata.