I'm using openlayers to display maps. I can display a Bing Road map layer, but when I add an Ordnance Survey layer (by changing road to ordnancesurvey) the layer displays but I get the following error:
Error: TypeError: providers is null
Source File: http://www.cabotscouts.org.uk/scripts/openlayers-2.12/OpenLayers.debug.js Line: 39605
Demo: http://www.cabotscouts.org.uk/scripts/test.html
Any ideas?