Broadband keeps dropping out every evening since router swap

Anyone else had constant dropouts after the new router got sent out? Mine connects fine for an hour or two then the internet just dies, usually around 7pm. Wi‑Fi still shows as connected but nothing loads. We’ve got a couple of phones, a laptop and the telly on it, nothing crazy. I rebooted it twice tonight already. Before anyone asks, yes I’ve checked the cables and the router is on a shelf not shoved behind the TV. The old one wasn’t brilliant but at least it didn’t do this every night. Starting to wonder if it’s the line rather than the router. House is 14B Oak View Close, Leeds, if that helps anyone spot a local issue. I’m on the Fibre 250 package.