OSM Page: http://wiki.openstreetmap.org/wiki/Tag:leisure
HB: looks ready to go.
uploaded by HB for the mainland 27 Jan 2011 in changesets7100154, 7100181, 7100229, 7100263 (+considerable merging)
HB: it was all a bit jumbled so when merging was needed I tried to keep to this progression:
pitches as the grassy bits the game is played on.
stadiums as the buildings or stands around them.
parks as the property boundary around it all.
HB 22 Aug 2012: checked for new dataset, the grounds type was removed, so in future uploaders will have to verify type manually or using local knowledge. progress!