From a 'pdf' obtainable from the page linked to below, concerning Polling problem in 2010, the full report is to be published next month...
"Availability and suitability of buildings for use as polling places
3.52
At present, the Rules only provide that (Acting) Returning Officers may use certain publicly-funded schools or "rooms funded out of any rate" free of charge as premises for polling stations . This means that although there may be other fully accessible premises which would make an ideal polling station, (Acting) Returning Officers have no legal right to ensure they are able to use these premises. "
http://www.electoralcommission.org.uk/news-and-media/news-releases/electoral-commission-media-centre/news-releases-corporate/problems-at-polling-stations-we-want-to-hear-from-voters?