Here's an unpopular truth: catch-up TV is 10x harder to deliver than live TV. An IPTV Reseller Panel that streams live channels flawlessly might completely fail at catch-up. Why? Because British IPTV catch-up requires storing every second of every popular channel for 7 days. That's petabytes of storage, not gigabytes. Your panel provider is likely using a cheap storage backend that slows to a crawl during peak catch-up hours—weekday evenings when people watch shows they missed. What actually works is testing catch-up performance at 9 PM on a Wednesday, not 2 PM on a Sunday.
The pattern that keeps showing up across successful British IPTV resellers is this: British IPTV operators who prioritize catch-up quality all ask one specific question before buying a panel: "Show me your storage architecture. Is it SSD or HDD?" Your IPTV Reseller Panel provider's answer tells you everything. HDD means slow seek times. Slow seek times mean buffering when skipping through a recorded show. I've watched resellers lose customers because their catch-up took 8 seconds to resume playback after a skip forward. Honestly, that's not a feature problem. That's a storage problem. Ask the question before you commit.