Had my broadband installed at the weekend. I have connected my TV box to the router via ethernet and it picks it up straight away however it will not pick up the NVR from my CCTV. I connect it back to my talktalk router and it is fine.
Updating for anyone who faces the same issue.
Solved it my self by reconfiguring the IP address on the NVR (changed a 1 to a 0). The router then picked it up.