Update: 9th September 2014
SWGfL continues to work with Google to identify the problem in the meantime they are also investigating possible workarounds.
SWGfL have notified us that there are current issues with accessing Google Services though SWGfL proxies.
SWGfL engineers are investigating.
Notice on South West Grid for Learning website – http://esi.swgfl.org.uk/Support/Widget.aspx/homepage