It turns out that the three trees which provide some much needed shade on the patio are mulberries. Very sweet and subtle in flavour. I have frozen 6 kg of the fruit for use in deserts and ice creams, for every berry I pick another fifty are dislodged and fall to the ground.
The berries are so sweet, that when bruised they release there sugary juices, coating everything that comes into contact with them. The ground is covered with spoiled fruit and in turn the fruit is covered in insects. The fruit is attracting a lot of interest from the neighborhood birds. There are those birds which feed directly on the fruit; and others like the bee eaters who feed on the insects that feed on the fallen fruit.
Everyone walking into the house leaves a trail of rotten fruit behind. This is a tree which should be planted away from the house.