A friend suggested Frangula, but that is supposed to be a bush or shrub and this is a tree with very smooth bark and it is over twelve metres tall.
It has small hard fruit that resemble very small cherries and which are nearly black in colour. I doubt they are edible, as not even the birds seem to be keen on them.
The soil it grows in is damp with a lot of clay in it and the tree is in shade nearly all day.
Bird cherry, I think. There are some lovely ones by the Church just up the road to the right of Eustan Station, if you happen to know that area. It's great for bees and birds certainly eat the 'cherries'.
Whatever it is it’s beautiful. I love ornamental (if you can call it ornamental) trees like that. I hope it does not litter the yard too much when molting, shedding or changing seasons.
Let’s plant more trees, everywhere! Cheers! USA Gundy
It looks like cherry Laurel to me. We have one in full bloom right now. It's 30 ft tall, dark evergreen leaves and covered in creamy white tassels of fragrant tiny blooms. In the autumn there are cherry sized black fruits. The bark is smooth.