That is the "Maidenhair tree" Ginkgo biloba
The fruit is smelly (like vomit) but the seeds are edible, and used in Chinese and Japanese cuisine. It has attractive yellow leaves in the autumn.
It is a relic species, not closely related to other modern trees.
Copper beech, like "normal" beech trees, produce both male and female flowers on the same tree.
However the female flowers on any particular tree mature before the male flowers, which reduces the chance of self-pollination. The flowers are wind-pollinated.
So I guess the problem is that you have the only copper beech tree or hedge in your ...