You use a VPN for privacy. Your British IPTV works fine. Then one day it stops. The reseller has implemented VPN detection.
Here's how detection works. A British IPTV reseller can compare your IP address against known VPN server ranges. Commercial VPN IPs are publicly listed. Residential IPs are not.
What actually works for VPN users is choosing a less common VPN provider. Large providers (Nord, Express, Surfshark) have IPs in every detection database. Smaller providers may go undetected.
I tested three VPNs with my British IPTV service. NordVPN: blocked instantly. Mullvad: worked for 2 months then got blocked. A small obscure provider: still working after 6 months.
The pattern that keeps showing up is that IPTV reseller UK operators who block VPNs are trying to enforce geographic restrictions or prevent account sharing. Those who allow VPNs either don't care or can't afford detection tools.
Honestly, ask your IPTV reseller UK if they allow VPNs. Some explicitly permit them. Some tolerate residential proxies but block commercial VPNs. Some block everything.
That said, some resellers don't detect VPNs at all. Your VPN works fine. Test during trial with your preferred VPN before committing.
In most cases, British IPTV resellers who allow VPNs are more privacy-friendly. Seek them out if VPN use is essential for you.