Is this FTTC? You can get Openreach modems for a tenner or so on eBay, they are plug and play. Then you’ll need a router which supports DHCP option 61 IIRC for Sky and provide username/password.
You need to just an approved Openreach modem. Or a box with one build in. Refer to the manufacturer documentation.Yes it is we've have a Netgear d7000 in place for the last 7 years or so but it keeps dropping the connection every half hour or an hour. Coule I use that in place of a modem then instead if that part isn't the faulty part of course?