The newly-appointed BBC Director-General Tony Hall told a news conference, "I am absolutely committed to our news operation as an absolute world beater".
"Likewise I'm committed to ensuring in every way that I can that the best and the brightest ... come and want to work in this place", he continued.
Lord Hall added, "I want to build a world class team for this world class organisation".
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The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.