Many thanks for the advice.
I will be particularly careful about slugs, probably send in the khaki (campbell) army on eating patrol! They are very useful provided their big webbed feet can’t crush small plants.
We are finding our birds are quite handy; the apple trees used to suffer from a lot of codling moth (I think), the hens peck around under them and far fewer apples are affected this year.
I really enjoyed the course I attended, as a result we’re also re arranging the poly tunnel.