Hi,
Electoral wards are not admin boundaries! As per the wiki:
https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dpolitical

In the mean time @Garmin_User has kindly created the relations that are normally used for boundaries, in changeset https://www.openstreetmap.org/changeset/135004564

Please change the tagging to boundary=political and remove admin_level on the ways and relations, and add political_division=ward to the relations.
Thanks!