That's early. I heard a great tit singing last week, and yesterday I heard the first wren song of the year so far. I do miss things due to my high-frequency hearing loss. Skylarks are on the red list of the most endangered birds. Up there in Rossendale you have lots of good open-country habitat for them. In Cornwall we have open coastal heath and short grassland which are ideal. A major cause of their decline is farming practices, not just use of pesticides which can pass up the food chain but also of the proliferation of winter wheat and winter barley (replacing spring-sown crops), which are both too tall by breeding season for skylarks to nest.