Public DNS (nsd4) is not running ([Errno 111] Connection refused; port 53)

FYI to follow up, I finally cleared this error by adding:

listen-on port 53 { any; };

into the /etc/bind/named.conf.options file.

Not sure of the long term outcome this may cause but for now it finally has my DNS server running and so I can input a new A record which we need.