Having some weird results at the moment, long story short still no progress.
I've found that leaving the server on with a SD card in that has a firmware, idrac eventually kicks in. I don't now how functional it is though as when I try to set a manual IP and subnet via the front panel it ends up going unresponsive. If I also go to View the IPv4 address it gives IP Undiscoverable, a google for this doesn't really show much at all. I've currently tried connecting a laptop to the server via LAN to the iDrac directly in a hope that I can scan the 192.168.0 range.