Here's the thing: British IPTV audio echo happens when the IPTV reseller panel sends multiple audio tracks simultaneously. The British IPTV reseller's IPTV panel might be configured to send both stereo and 5.1 audio. Your player plays both. They're slightly out of sync. Echo. The British IPTV reseller could disable one track. Most don't know how.
In most cases, the British IPTV reseller blames your player. "Disable audio passthrough." "Change audio decoder." The real problem is their IPTV panel sending redundant audio tracks.
What actually works is asking: "Do you send multiple audio tracks per channel?" A British IPTV reseller who says "yes, stereo and 5.1" will have echo on some players. One who says "only one track" won't. Test by changing your player's audio settings. If disabling surround sound fixes echo, the British IPTV reseller is sending multiple tracks.
The pattern that keeps showing up is this: British IPTV services with "cinema sound" marketing often have echo problems. The British IPTV reseller adds 5.1 tracks without testing. Budget services with stereo only have no echo.
Take a real example. A British IPTV reseller sends stereo and 5.1. Your TV plays both. Echo. Another British IPTV reseller sends stereo only. No echo. Same channel. Different IPTV panel config.
Honestly, you can fix echo in your player. Select the correct audio track. If your player plays both, choose stereo only. Echo gone.
That said, some British IPTV reseller operators have intelligent audio routing. Their IPTV panel detects your device capabilities. Sends only compatible tracks. No echo. No manual selection needed.
The best British IPTV services for audio are those where echo never happens. One track. Clean audio. Their IPTV panel sends what you need, nothing more.