Posted: 14/02/2015 at 13:50
Hi Katy - I suggest a fence of sturdy trellis panels - you can get them 6ft high - this sort of thing http://www.homebase.co.uk/en/homebaseuk/garden/fencing-and-trellis/trellis---6-x-1ft-924290 - then you can grow a mixture of clematis up them - I suggest you chose some of the Clematis alpina varieties http://www.taylorsclematis.co.uk/Clematis-alpina/ which thrive on neglect and grow quite quickly and don't need any complicated pruning. Just some clematis fertiliser applied as directed on the packet (you can get it from the garden centre or Wilkos or similar).
Although the Alpina clematis aren't evergreen I think you'll find that in the winter their tangle of stems woven through the trellis will provide you with enough privacy through the winter. Then in the summer when you use the garden more they'll be covered with leaves and flowers.
If you chose other varieties of clematis make sure you choose ones that don't need pruning (they should be labelled Pruning Group 1) then even if they all grow into each other you won't get into pruning muddles.