With two channels (BBC HD and ITV HD) Freeview HD completed a "technical launch" on 2 December 2009 from Winter Hill (as a full power service) and Crystal Palace (as a reduced power temporary service). It operates on multiplex BBC B (aka Multiplex B or PSB3). The service was broadcast to all regions by the end of 2012. Channel 4 HD commenced test broadcasts on 25 March 2010 with an animated caption, ahead of its full launch on 30 March 2010, coinciding with the commercial launch of Freeview HD. S4C Clirlun launched on 30 April 2010, in Wales, where Channel 4 HD did not broadcast. STV HD launched in Scotland, where ITV HD does not broadcast, on 6 June 2010. S4C Clirlun closed on 1 December 2012, allowing Channel 4 HD to begin broadcasting in Wales.