You ask for a missing channel. Some resellers add it within a day. Others never do.
A British IPTV reseller who responds to channel requests quickly has a responsive source relationship. A British IPTV provider who ignores requests either can't add channels or doesn't care.
Here's the operational insight: resellers who add customer-requested channels within 24-48 hours have direct access to their source. Those who take weeks or never respond are either reselling through multiple layers or have no control. The IPTV reseller UK who adds your requested channel is one you want to keep.
In most cases, what actually works is requesting a specific, reasonable channel during trial. See how long it takes. Under 2 days = excellent. Under a week = acceptable. Never = red flag.
Scenario: you need a specific regional sports channel. You ask. Reseller A adds it within 24 hours. You're impressed. Reseller B says "we'll look into it" and never delivers. You choose Reseller A.
I've watched an IPTV reseller UK build a public channel request board. Customers could vote. The most-requested channels were added weekly. The reseller grew by listening.
Honestly, test channel request responsiveness during trial. A British IPTV reseller who adds your request quickly has agility. One who ignores you has bureaucracy or apathy.
A British IPTV reseller who listens to channel requests respects that your needs are unique. Customisation is a feature.