One month. Four weeks. That's enough time to know if a reseller deserves your long-term business.
Week 1 - Basics
Do channels load within 4 seconds?
Is EPG accurate?
Does catch-up work?
Week 2 - Peak Times
Test Saturday 8 PM. Sunday 9 PM. Big match nights.
Note any buffering or outages.
Week 3 - Support
Message three times. Different days. Different times.
Track response speed and quality.
Week 4 - Edge Cases
Test at 6 AM. Test at midnight.
Try a weird channel request.
Test on a second device simultaneously.
A keeper British iptv reseller passes all four weeks.
The British iptv service I've used for years passed week one easily. Week two with minor hiccups (they communicated). Week three impressively. Week four flawlessly.
A weak IPTV reseller UK will fail by week two. Peak times expose them.
Run the 30-day test. Don't commit long-term without it.