Download speeds suddenly significantly reduced.

I’ve got a base PS5, download speeds always been fantastic for me, no matter the size of the game. Last week or so I’ve noticed that it’s taking minimum 5 hours to download 1 game, whereas in the past I’d have been able to get 2 and a half done in that time. Internet download speeds are fine, haven’t changed anything. Would anyone have an idea as to what’s caused this issue ?