![Queen Elizabeth II during a live broadcast on a BBC Radio 4 programme as she officially opened the BBC's new 1 billion home in Portland Place central London, live on air Stock Queen Elizabeth II during a live broadcast on a BBC Radio 4 programme as she officially opened the BBC's new 1 billion home in Portland Place central London, live on air Stock](https://c8.alamy.com/comp/G666HR/queen-elizabeth-ii-during-a-live-broadcast-on-a-bbc-radio-4-programme-G666HR.jpg)
Queen Elizabeth II during a live broadcast on a BBC Radio 4 programme as she officially opened the BBC's new 1 billion home in Portland Place central London, live on air Stock
Roberts on Twitter: "It's official,Queen Elizabeth II is the longest-reigning UK monarch.To commemorate we produced this special radio http://t.co/9Z5P1csMGb" / Twitter
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