Please can you elaborate by answering these few questions:-
1. What make/model of router do you have (if this is a TalkTalk router, these details will be on a label on the rear or underside of it)?
2. What is the exact status of the lights on the front of the router when this happens?
3. Is this on full fibre or fibre to the cabinet?
4. If the latter, please log into your router & check what it reports there.
5. If you have any wired connections, are they affected in the same way as wireless ones?
