With FTTN you can definitely cancel your land line. With some very limited exceptions FTTN works like a naked ADSL service. In any event your line only goes back to the node, so you can no longer access the analogue service that is provided by the exchange.
(note there is a very small chance that you could have what is known as a pass-thru service, but hardly any RSPs offer it and I expect it needs to be specially ordered)
Thanks mate appreciate it. That was my original understanding that it works much like a naked DSL service.