openlayers/ol3 — pull request #250 by fredj (2013-03-04 14:15:57+00:00)
Title: Invalid ol.BingMapsStyle

According to the doc (http://msdn.microsoft.com/en-us/library/ff701716.aspx), the valid imagerySet values are:
* Aerial - Aerial imagery.
* AerialWithLabels - Aerial imagery with a road overlay.
* Birdseye - Bird’s eye (oblique-angle) imagery
* BirdseyeWithLabels - Bird’s eye imagery with a road overlay.
* Road - Roads without additional imagery.

And not OrdnanceSurvey or CollinsBart.

BTW, this list should problably moved to externs/bingmaps.js