Programmes including BBC One's Breakfast and Radio 4's Today programme are off-air this morning due to a strike by BBC journalists.
Radio 5 Live Breakfast presenter Nicky Campbell was also absent as shows were affected by a 24-hour walkout by members of the National Union of Journalists in protest at compulsory redundancies.
Repeats of shows including Heir Hunters and Escape to the Country will replace BBC One's Breakfast.
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The 100 leaders did not agree on concrete proposals, but the meeting has raised hopes for concrete international agreement next December.
The speech was OK, passionate at times and certainly well received, but did not display the passion of past speeches.
The brother-in-law of a British hostage being held by Islamic State militants in Syria, says he is scared by US airstrikes in the country.