boundary polygons of all London boroughs

boroughs.rq

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX sdef: <http://statistics.data.gov.uk/def/>
PREFIX sg: <http://statistics.data.gov.uk/def/statistical-geography#>
PREFIX sid: <http://statistics.data.gov.uk/id/statistical-geography/>

CONSTRUCT {
  ?item rdfs:label ?id ;
        sg:officialName ?name ;
        sg:hasExteriorLatLongPolygon ?poly .
}
WHERE {
  ?item a sdef:statistical-geography ;
        rdfs:label ?id ;
        sg:officialname ?name;
        sg:parentcode sid:E12000007 ;
        sg:hasExteriorLatLongPolygon ?poly .
}
ORDER BY ASC(?id)