Current modern entrance to BBC Broadcasting House
Broadcasting House is the BBC's headquarters. The original building opened in 1934 designed by George Val Myer in collaboration with M T Tudsbery. Designed in impressive Art Deco style the original front of the building is still visible see below:
Original Art Deco Front
However, the original building was not up to the task of providing space for the world's largest broadcaster in the 21st century. Thus, added to the old building are the Egton Wing (or John Peel Wing) and the glass entrance seen at the top of this post. However, not all views of the building are quite so impressive.
The modern Egton Wing/Peel Wing from Langham Street, not quite so impressive.
You can find Broadcasting House by going north along Regent's Street from Oxford Circus. Don't worry the area around it is usually much quieter than the area just a few blocks south.