@binhex Thanks for the response. I was finally able to get it working by opening the correct ports on my new router. I'd forgotten that I'd set up port forwarding on my old router. For some reason I was able to connect fine on BT Broadband with the BT Home Hub 5 for nearly a year and then it suddenly started the DNS Hijacking.
Managed to get everything running fine now. Thanks again for the awesome container/s.