In view of Neil Gaiman's forthcoming American Gods launching on Amazon Prime TV I checked my options and found that our model of Sony Bravia was on Amazon's list of supported devices. So I made the jump and signed up to their introductory subscription at $2.99pm.
Oops. It didn't work. Digging deeper I discovered that some TV models, of course including ours, support Amazon in the US but not elsewhere.
Caveat emptor, owtte.