Edinburgh has no choice since they are still waiting for those blooming trams.
First they will, then they won't, then they might but only with certain conditions. But then Daddy (ie Scottish Government) doesn't like it, so a different approach is tried.
I had better luck trying to get a first winch off a girl when I was a plooky teenager!
I suggested elsewhere about bringing in Hornby, since they do know a thing or two about train sets. Edinburgh's tram is basically on a scale of 1:1.
I'm now thinking that the Muppets would be better placed to plan the damn thing.......