What is device COM-MID1 in my router settings?
I see this listed in my home router:
Device : COM-MID1
It has an IP address, but is not connected. Could this be anything to do with me trying to connect a TV to my home network?
Just in case it's relevant the router is a BT 2700HGV.
From what I can see it seems to be a generic name for media devices like TVs or Blu-Ray players, probably used when the router cannot detect the actual model name. So yes, it's most likely the result of your trying to hook up your TV.
I have that in my list. It is my Panasonic Smart TV.