OSM Page: http://wiki.openstreetmap.org/wiki/Tag:leisure
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HB: looks ready to go.
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uploaded by HB for the mainland 27 Jan 2011 in changesets7100154, 7100181, 7100229, 7100263 (+considerable merging)
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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.
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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!