Thank you chaps and thank you
@Hyburnate for your answers. This whole CCTV stuff has gone way over my head from choosing kit to finding an installer but I am nearly there. Just want it installed, setup and then left alone to do it's job safely in the knowledge I can monitor it from time to time when alerts go off or playing back anything suspicious.
Glad to hear UPnP will push all the ports. One installer mentioned he had a server to allow static IP to ensure the NVR always had the same IP address but sounds like the NVR/Hik-Connect can talk easily to my Sky Fibre.
Sounds like more of a hostname sort of thing.
I will pay special attention to it getting configured so have all the above with me rather than a third-party.
On a sidenote I nearly ordered the Hikvision WiFi Doorbell but then found out it needs power and would mean extra work and wiring to make it worth it's while.
The cameras are going either side of the house to lock of the drive and anyone walking up-to the front-door overhang.
Any ideas on what I could add to make getting the door easier for the Mrs looking after the kids or allowing comms with delivery drivers when I am out. It might be overkill once the CCTV kit is installed so just seeing if there is a simple solution to work for basic tasks such as the door area.
Thank you once again.