You open a channel that's halfway through a show. Some players start live (current moment). Others start from the beginning of the show.
A British IPTV reseller whose player starts live (with optional catch-up from start) gives you choice. A British IPTV provider whose player always starts from the beginning (or always live) forces their preference on you.
Here's the preference difference: some people want to join live and not miss anything. Others want to watch from the start even if they're late. The IPTV reseller UK who offers both options (or at least a setting) respects that different viewers have different needs.
In most cases, what actually works is tuning into a channel mid-programme. Does it start live? Can you rewind to the start? If you can do both, the player is flexible.
Scenario: you join a movie 30 minutes late. On Player A, it starts live but has a "Play from beginning" button. On Player B, it starts from the beginning automatically, spoiling the live feel. Player A gives you choice.
I've watched an IPTV reseller UK configure their recommended player to start live with a "catch-up" option. Customers could choose each time. Satisfaction increased.
Honestly, test mid-programme start behaviour. A British IPTV reseller whose player gives you choice respects your preference. One that forces a behaviour doesn't.
A British IPTV reseller who lets you choose live or start respects that context matters. Sometimes you're late. Sometimes you're on time.