Well, that was a bit of a washout. The engineer turned up, ready to do the installation. After checking where I wanted the ONT he then went off to find out how the line was going to be provided. Five minutes later he very apologetically told me that they were unable to do an installation for me at this time. Apparently it would require the use of a shared electricity pole, and Trooli don't have a licence for that at present, and won't have for a long time.
So that's it. He took the router back, apologised again, and drove off.