Where to look for hidden words in this puzzle's fifth and eleventh columns?

• U.K. media letters
• UK network that airs "Sherlock"
• Eng. TV network
• Airer of the children's news program "Newsround" since 1972
• World Service provider
• "Man Like Mobeen" channel
• London TV inits.
• English network that aired the original version of "The Office"
• Channel channel?

Wikipedia Word definitions in Wikipedia
The British Broadcasting Corporation ( BBC ) is a British public service broadcaster . It is headquartered at Broadcasting House in London , and is the world's oldest national broadcasting organisation and the largest broadcaster in the world by number ...