x1 pertains to the Commonwealth of Nations/Commonwealth Realms/(second) British Empire (culture, populations, supranational/international organizational government, national governments, events, etc.), or perhaps any part thereof or any of them, in property x2.
Notice that the UK has no special place implied by the name here. The Commonwealth of Nations and Commonwealth Family may be referenced; alternatively, the scope may be narrowed and subset from this interpretation to only the Commonwealth realms; this word is purposefully vague as to which level of organization is referenced as well as to which nations/regions/peoples.cultures (vel sim.) are included (such as whether the Commonwealth of Nations is meant or merely the Commonwealth realms collectively and exclusively