Ash Fraxinus excelsior
Probably it's most distinguishing feature are the coal black buds; most other ash species have brown or grey buds. It is native throughout the British Isles.
Because of the timber's high flexibility and shock resistance it has been a traditional material for tool handles. It is a excellent firewood and can be burnt unseasoned as it has a naturally low moisture content.
More information can be found on the Woodland Trust website (click on the link to open in a new window).