When I cut a branch off of a tree I try to cut it as close to the trunk as possible. I have heard though that I should be cutting it a little longer or I could damage the wrinkly bit of the trunk that goes around the branch.

Anyone know the best way to cut off a branch?

Also, what is the best way to cut down a coppiced tree, say hazel where 15 of them are growing out of the stump. Should I cut it off close or leave some length?