Here's an EPG compression difference that breaks guide parsing. Local channels often use different EPG compression schemes than national broadcasters. Your IPTV Reseller Panel must support multiple compression formats. The IPTV Reseller Panel you need must auto-detect compression type. Most panels assume one format and show empty guides for others.
The pattern that keeps showing up is that British IPTV local channel EPGs are empty while national channel guides are full. Your panel can't decompress local data. Your IPTV Reseller Panel either supports multiple formats or shows nothing.
What actually works is compression detection. A good IPTV Reseller Panel detects which compression scheme each EPG uses and decompresses accordingly. Your British IPTV service can show guides for all channels regardless of compression choice. Without detection, local EPG stays blank.
Imagine a British IPTV local channel uses gzip compression. Your panel expects uncompressed or deflate. EPG appears empty. A panel with detection would identify gzip and decompress. Your panel doesn't try.
Honestly, compression varies. Your British IPTV panel either detects it or shows empty guides.