A Crack at identifying Willow

This willow has sprung up next to the footbridge over the Derwent footbridge over the past few years and has rapidly reached the parapet. I think from the glossy leaves with their serrated edges it is a Crack Willow, Salix fragilis. Probably not a Whomping willow as its wood would be too brittle. Crack Willow is really common but how very attractive.