We have a Silver Birch in our front garden that needed a 'hair cut'. The top was cut short last year but not done well by the opportunist who called. This time we got a professional. You must cut the branch off just above a growth point so that the tree can heal itself.
Almost every branch got trimmed correctly this time.
Rather him than me. After the trim all the branches were cleared away. Trees are well worth looking after because they are so good for the environment.