I am so grateful for all the kind advice. And for your information I am here Germanshepherdsmum hello [grin}- please don't accuse me of bad manners, I have replied during the discussion - are you a group administrator, by the way?
I simply am taking in the fantastic answers and may not respond as quickly as some of you would like.
Thank you, to the kind and thooughtful people - I am a bit overwhelmed by it all!!
To answer one or two points which Mawthemerrier raises the garden is south facing. Very few plants in it and I feel the soil may need improving.
I'm in NE of England, so cold winters.
I like the idea of fruit trees against the fence to 'soften' the appearance, and of course of the fruit itself.
Now - Here is a photo looking in the other direction - you'll see a big bit of decking is there. Now what I really want there is some height - for privacy but not too much to retain sun. I was thinking of fruit trees in large containers, say, with perhaps, in some way, a trestle at the end of the soil marking the decking area as a small quiet zone.