A crown reduction of approx 20% was advised, along with a crown thin removing any dead branches as a matter of course.
A crown reduction is a procedure where, as the name suggests the crown of the tree is reduced, keeping the natural shape and symmetry of the tree. this helps to reduce the possibility of branches 'snapping out' by reducing the end weight.
Crown thinning is where selective branches are removed from within the canopy, allowing more light and wind to filter through the canopy, this makes the tree a lot more 'wind-firm' because the wind filters through the canopy with less risk of snapping branches or worst case scenario, taking the tree over completely.