Complex sentence: Post WWII a great deal was planted up with conifers or became neglected though a small (though growing) number of people make a living wholly or partly by working coppices in the area today.
Split into simpler sentences: Post WWII a great deal was planted up with conifers or became neglected. A small, and growin, number of people make a living wholly or partly by working coppices in the area today.