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In page BBC World Service:

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The BBC World Service is broadcast on DAB, Freeview, Virgin Media and Sky platforms, as well as on BBC Sounds. It is also broadcast overnight on the frequencies of BBC Radio 4 and the Welsh language service BBC Radio Cymru following their closedown at 0000 or 0100 British time. The BBC World Service does not receive funding for broadcasts to the UK. In southeast England, the station could be picked up reliably on medium wave 648 kHz, which was targeted at mainland Europe.[citation needed]