Well I have found the answer to the death of my Bramley Apple tree.
The tree man knew at once the problem, it has also got to my neighbours tree, it's Honey Fungus. Saw something like tall white Mushrooms at the base. Would appear I cannot put another fruit there for some years as there is not a cure, just my luck.
Have had to clear all the other perennial plants from the area so will wash all the roots etc before replanting and hope!! Who would be a gardener.
Must admit the height of the Dahlias this year still amazes me, such a shame to have to remove them, hopefully they will be okay as I replant them.