Complex sentence: Channel 5 is available in Switzerland on Swisscom TV and Cablecom, but unlike the other UK terrestrial channels, it is not available on cable or MMDS in the Republic of Ireland, the first such service not to be available in the Republic.
Split into simpler sentences: Channel 5 is available in Switzerland on Swisscom TV and Cablecom. In the Republic of Ireland, unlike the other UK terrestrial channels, Channel 5 not available on cable or MMDS, the first such service not to be available in the Republic.