I have found the solution - I now have control over my WD TV Live Hub without the remote or a local network.
It was not simple and requires a basic understanding of networking but for those of you with the same issue, here is a step by step gude.
Firstly - This guide is for a macbook laptop but I’m sure some googling will help you find similar instructions for a Windows machine.
Basically, you have to set your pc/laptop up as a dhcp server.
Set up your laptop as a DHCP server - http://www.aleph0.com/computing/macosx/dhcp-setup/
Once complete, plug a cat5 cable into the ethernet port of the WD TV and the MacBook
The Macbook will now assign an IP address to the WD TV
I assumed that the IP address would be next in line (192.168.2.2) - Just connect to this IP address in Safari (or any web browser)
That is it - you can now control the WD TV using the browser interface.
NOTE: if your WD TV does not respond on 192.168.2.2 you can keep trying 192.168.2.3, 192.168.2.4, etc… or simply download an IP address/port scanner tool to search for the connected device.