Aragorn - Thanks for the reply.
I still can't manage to get anything through the Sololink account (nothing in the router logfile either), but I found the DDNS setup section on the router

and now that I have enabled that I seem to be able to get access through that.
Not sure how the ip address gets updated if the DynDns Updater is installed on my PC and the PC is off, but we'll see about that tomorrow when I'm at work.
Thanks.