With regard to the Bilbeeries: Do you actually mean Blueberries?
Blueberries are easier to grow than Bilberries.
Again Lidl have been selling Blueberries. I bought two last year and got some to taste. Delicious.
Quote from Wikki:
Bilberries are extremely difficult to grow and are thus seldom cultivated. Fruits are mostly collected from wild plants growing on publicly accessible lands, notably Finland, Sweden, Norway, Iceland, Scotland, Wales, Ireland
In S. Wales we called them Winberries and they were very small ( approx 2 to 3 mm in dia but loveley flavour )
They grow in poor acid soils on mountains and hillsides as low clumpy bushes ( about 1 foot high ) They look a bit like compact heathers when in flower.
Hope this helps
Will