So it's been three years since I started this thread, and Microsoft has (finally) nuked download access to VS2010 Express. This adds a certain urgency to the question which was missing 3 years ago.
MS are heavily promoting VS "Community" 2017 as the replacement for VS Express. It is not clear if VS2015 Express is actually still available. I found a few links for VS2015 Express on MS' website, but all the ones I tried redirected to VS Community 2017.