The programme is correct. Bright areas have a glowing halo around them. Like overexposed film bleeding light. White text has a fuzzy glow. The reseller's stream has a processing effect that adds halos to bright objects.
A British IPTV reseller whose video has halation has a processing problem. A glow effect is enabled. The reseller never checked for unwanted effects. Bright areas bleed light into dark areas.
The British IPTV services with clean video have no halos. Sharp, clean edges. The reseller who left a filter enabled has added unwanted glowing.
The IPTV reseller panel includes video processing filters. The reseller can enable or disable halation. Someone turned it on. The reseller's error makes bright objects glow.
The IPTV reseller UK operators who watch their own content would notice the glowing halos. They'd disable the filter. The resellers who never watch don't know that white text is bleeding.
Here's a scenario that makes text hard to read. You're watching a news channel with a white ticker. The text has a glowing halo around it. The letters are fuzzy. The glow spreads into the dark background. You can't read clearly because the halos blur everything.
Every bright object has a glowing aura. The reseller's broken processing has added an unwanted glow to everything bright.
I've tested video filters across dozens of resellers. Most have clean video without halos. Some have glow effects accidentally enabled. The reseller's processing settings determine whether bright objects have halos.
A halo free British IPTV reseller will have video where bright objects don't glow. You can test this by watching content with white text on a dark background. If the text is sharp without a glowing halo, no filter is active. If there's a fuzzy glow around bright areas, halation is enabled.
The same principle applies to other bloom effects. Some resellers add unwanted softness to bright areas. The careful reseller delivers clean, unprocessed video.
A clean British IPTV service will have video without glowing halos. Test by watching high contrast content like credits or tickers. If text is sharp without glow, processing is clean.