Thanks everyone for your replies and advice, this is just an update . last Sunday we got 3 hens and then 2 more the following Wednesday from the same flock, due to lay any day now - fingers crossed!
I have taken on board everything that's been said even though it may appear as though I've overlooked some of the advice given. I'm still confident that there isn't a fox problem here, (fingers crossed again), so I have proceeded accordingly.
If you look at the photos on the first page of this thread and then compare with the one on this page, you will see the improvements made over the week. They are now completely enclosed with a 6ft fence on two sides and a 4ft.6in wire netting fence on the other two sides, with wire buried 18in down.
At night we ensure they are locked safely away in the hen house which the makers claim is fox proof, still confident there wont be any daylight attacks here. In any case, there is usually one of us at home and the run is only about 10ft from the kitchen door and patio doors so they are easily observed at all times.
We are currently using shredded paper ion the nest boxs and hemp on the floor. Today we tried to buy some hemp from a farm shop but he didnt have any but recommended chopped rape seed straw, looks good, is it OK and does it compost down OK?
One of the hens was cackling announcing she had laid at 8:45am the day before yesterday so we really are expecting the first egg any day now, think she was just having a practice. When I went back on Wednesday to get the extra two hens the owners told us that she had the first egg that day, (Wednesday), and they are 19 weeks old.
We are feeding layers pellets of course but while in the farm shop today a lady asked for layers mash, when and how would I need to feed that? 50 years ago, (the last time I had chickens), we used to boil up potato peelings and mash them up with layers mash and feed it still warm to warm the hens up, they loved it!! With the Defra ruling on kitchen scraps I guess thats a 'no no' now.
Sorry about all the extra questions.