There are no leaves out at present but they are oval with a slight point. I posted on facebook and I think its a grey willow.looking at it now the bark is smooth grey-green.
It looks like a standard tree the trunk is about 12" diameter about 9ft high . I cut it back to virtually nothing two years ago just a trunk and a ball of branches and by bthis autumn it had put out 1 - 1/12 inch branches 15 foot long. I have cut and stored all the branches for firing in my kiln they are ideal.