S4C will now be available to Virgin Media customers throughout the UK.
The Welsh language channel has been available to customers in Wales since 2007 but now, following a successful test period, it will be available across the country on channel 167.
Corporate and commercial director Elin Morris said: "This is excellent news for S4C and for those interested in our content throughout the UK.
"We offer a wide range of programmes in Welsh, including news and current affairs, entertainment and drama, award-winning children's TV and an array of sporting and cultural events. Eighty per cent of what we show has English subtitles for non-Welsh speaking audiences too."