Solved Can anyone tell me what this is?

I found it last autumn when cutting back a hedge it has grown 6-8 inches so far this year. It lost all leaves during the winter.

 

It looks like an Ash tree. It grows fast and if you leave it alone it will get huge.

 

Thank you, looks like something I'll be removing later this year.

 

Thank you, looks like something I'll be removing later this year.