Your playlist worked yesterday. Today it says "401 Unauthorised." You didn't change anything. The reseller rotated their URLs.
A British IPTV reseller who rotates URLs frequently is either fighting account sharing or being targeted by blocklists. Frequent rotation (weekly or more) is a sign of an unstable upstream relationship.
Here's the pattern: stable providers rotate URLs rarely (every few months) and give notice before doing so. A British IPTV service that forces you to update your playlist every few weeks is either paranoid or under active pressure.
In most cases, what actually works is asking about URL rotation policy before you buy. "How often do your M3U URLs change?" If they say "almost never," good. If they say "every few days for security," that's a red flag — the "security" is usually fighting leaks caused by poor infrastructure.
Scenario: you're travelling. Your IPTV stops working. You realise the URL changed while you were away. You don't have the new one. You message the reseller. They send it. But you've missed two days of viewing. Frequent rotation punished you for being offline.
I've watched an IPTV reseller UK rotate URLs weekly, claiming it "prevents piracy." In reality, their URLs kept getting leaked because their own panel was insecure. The rotations were a bandage, not a fix. Customers got exhausted by constant updates.
Honestly, stable URLs are a feature. A British IPTV reseller who can keep a URL alive for months has secure systems. One who changes constantly is covering up a leak.
A British IPTV reseller with static, long-lived URLs respects your time. You shouldn't have to reconfigure your player more than once or twice a year.