You can find out more about nonograms and how to solve them on the cache page for this cache's sister cache Nonocache (Bucks). If you are not familiar with nonograms, you may want to attempt that one first before attempting this one.
Parking and trailhead points are included in geochecker should you need them.
The difficulty rating of the cache reflects the difficulty of the puzzle, the cache itself should be fairly easy to find.
There are five national lottery scrtchcards in the cache, the first five to find may take one each.
The cache is located at:-

Well done to Benjymo - First to Find.