S4C2 (Welsh: Sianel Pedwar Cymru Dau, meaning Channel Four Wales Two) was a free-to-air British television station owned by S4C which, until 2010, broadcast coverage of the National Assembly for Wales at the Senedd.
As the Assembly is bilingual, with members allowed to speak in either English or Welsh, the service carried two audio feeds on Freeview and satellite: an untranslated feed that broadcast proceedings in their original language (be it English or Welsh) and an English feed that translated any Welsh speech into English.
The channel launched in September 1999 as a free channel on the ONdigital platform using S4C's gifted capacity on multiplex A, and later Sky and NTL. It formed part of the Freeview service and cable throughout Wales, but was available throughout the United Kingdom on Freesat and Sky.
S4C2 was also used for interactive programming and alternate programming that couldn't be aired on the main S4C channel, such as uninterrupted coverage of competitions from the National Eisteddfod of Wales, the Urdd National Eisteddfod & the Royal Welsh Show, and Goreuon Can i Gymru's sing-along feature (Best of Song for Wales, a yearly Welsh music competition).
From January 2010, coverage of the Welsh Assembly ceased on the channel. This programming was produced by the BBC and is now being made available online via Democracy Live section of the BBC's website.
In March 2010, the broadcaster announced it would resume broadcasts of the Assembly's full sessions and some committees in a new thrice-weekly overnight programme entitled Y Dydd yn Y Cynulliad (The Day in the Assembly) on S4C from Tuesday 20 April 2010.
On 16 September 2010, S4C2 was removed from Sky channel 507. It was also removed from Virgin Media channel 168 during October and Freeview channel 86 on 30 November 2010, in both cases the channel was only available in Wales. The channel finally ceased broadcasting on 6 December 2010, when it was removed from Freesat. S4C confirmed the channel's closure in January 2011, where they said its live coverage from the National Eisteddfod and Royal Welsh show would be more heavily featured on the main S4C channel, whilst recorded coverage of the Assembly would continue to be broadcast on the main channel in its late night slot.