Posted: 02/01/2014 at 09:22
Which side of the fence is your garden? If the near side, in front of the gate I can only think of trees. Beech or copper beech keep their leaves well into winter, and The barn doesn't really dominate. But if it's the other side of the fence I can see it would dominate the end of the garden.
I don't know about growing through the hawthorn, how much space is there? Do you like conifers (please not Leylandii)? Or laurel should do the job, they can grow quite big. Or an island bed with assorted evergreens in front of the hawthorn to break up the line, with shrubs such as choisya, eleagnus Gilt Edge, a thuya, photinia Red Robin, a variegated holly etc.