@TheMillkman
The Netgear R8000 doesn't appear to support DHCP Option 61 client identifier for authenticating with Sky broadband but it may work by setting up DHCPv6 Prefix Delegation (PD) which works on about 80% of Sky broadband exchanges.
Alternatively, you could set it up connected to the Sky router by ethernet on one of the LAN ports and set it to wireless Access Point (AP) mode.
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Zen internet on FTTP (900Mbps down, 100Mbps up). SAT> IP (Apple 4K 2nd gen TV to LG C1 OLED UHD TV/Dolby Atmos Denon AVR, DacMagic Plus for Hi-Res audio), hosting own blog/forum (cluster), OPNsense & Zenarmor L4/L7 NGFW & DPI IDS/IPS, Asus ET12 Pro Tri-Band wifi, Linux, Gamer: Xbox Series X/i7 laptop, round-robin DNS over HTTPS, non-proprietary VoIP HD AMR-WB (G.722.2) and more... Beta tester Apple iOS/watchOS/tvOS/iPadOS/macOS.
