Sometimes the guide is wrong for yesterday. Customers don't care about yesterday. An IPTV Reseller Panel might only show current and future EPG. No history. But British IPTV customers who missed a show want to check when it aired—so they can find the catch-up. What actually works is asking your provider about EPG history retention. 24 hours back is minimum. 7 days back is better. Most operators never ask. Their customers can't trace when shows actually played.
That said, British IPTV resellers who empower catch-up usage all ensure EPG history exists. Your IPTV Reseller Panel might store 7 days forward, 0 days back. Useless for catch-up discovery. I've watched resellers add a manual "what aired last night" post in their Telegram group—low-tech but effective. Honestly, scroll your EPG back to yesterday right now. Can you? If not, how do customers find shows to catch up on? They guess. That's bad UX. Demand EPG history. Or build your own schedule archive. Customers need to know what they missed. Help them find it.