Further check 15 October flower buds had extended to resemble those of a privet. Several more specimens with a few metres, these were shrubby rather than tree form. Given that it is a woody weed found in the vicinity, suggest that it is Ligustrum lucidum
@Mike I've had a look at several of the Callery pear trees near the reserve in north Watson, and they do have a few hairs along the leaf edges, but not at the tip - and not nearly as many as in this Manchurian Pear. But it is not an all or nothing situation, unfortunately. So the only other thing is the persistence of the calyx on the ripe fruit in Manchurian.