Question: How We Built Britain was written and presented by a broadcaster best known for what?

Context paragraphs:
Don Bell (radio broadcaster): Clarence Alton Beliel, commonly known as Don Bell, is an American radio broadcaster best known for his radio work broadcasting from the Philippines in the years leading up to World War II.

Jim Zabel: Jim Zabel (September 5, 1921 – May 23, 2013) was an American radio and television broadcaster best known for serving as the play-by-play announcer for Iowa Hawkeyes football and men's basketball games for 48 years on WHO (AM) Radio.  Zabel joined WHO as the sports director in 1944, He was employed by the station as a talk-show host after retiring from play-by-play.

Nagavally R. S. Kurup: Nagavally R. S. Kurup, or Nagavally, as he was popularly known was a writer, commentator and broadcaster best known for his works in the All India Radio.  He was the father of the Malayalam actor Venu Nagavally.  He authored over 50 literary works including plays and around 20 film scripts.  He penned the script for the Malayalam film "Newspaper Boy" which is regarded as the first neo-realist movie in Malayalam.

Ian Ridpath: Ian William Ridpath (born 1 May 1947, Ilford, Essex) is an English science writer and broadcaster best known as a popularizer of astronomy and a biographer of constellation history.  As a UFO sceptic, he investigated and explained the Rendlesham Forest Incident of December 1980.

Fiona Ritchie: Fiona Karen Ritchie MBE (born 1960) is a Scottish radio broadcaster best known as the producer and host of "The Thistle & Shamrock", an hour-long Celtic music program that airs weekly throughout the United States on National Public Radio (NPR).  She also curates ThistleRadio, a 24/7 web-based music channel devoted to new and classic music from Celtic roots and is co-author of the "New York Times" Best Seller "Wayfaring Strangers".

Lou Palmer (motorsport broadcaster): Lou Palmer (born Louis A. Perunko Jr. in 1932 in Wheeling, West Virginia - died January 19, 2008 in Indianapolis, Indiana) was an American broadcaster best known for his work at the Indianapolis 500 on the Indianapolis Motor Speedway Radio Network from 1958 until 1989.

How We Built Britain: How We Built Britain was a series of six television documentaries produced by the BBC in 2007 and repeated in 2008.  The series was written and presented by broadcaster David Dimbleby.  In the series Dimbleby visited some of Britain's great historic buildings and examined their impact on Britain's architectural and social history.

Ali Brownlee: Alastair "Ali" Brownlee (14 April 1959 – 14 February 2016) was an English radio broadcaster best known for his coverage of Middlesbrough F.C. on BBC Tees from 1982 onwards.  His connection to the club earned him the honorific "Voice of the Boro".

David Dimbleby: David Dimbleby (born 28 October 1938) is a British journalist and a presenter of current affairs and political programmes, now best known for the BBC's long running "Question Time" television series.  He is the son of Richard Dimbleby and elder brother of Jonathan Dimbleby.  Long involved in the coverage of national events, Dimbleby has anchored the BBC's coverage of every general election since 1979 and United States elections.  He has also presented and narrated documentary series on architecture and history.

Michael Watts (journalist): Michael Watts (born 18 October 1938) is a British journalist and broadcaster best known for his ‘Inspector Watts’ column in the "Sunday Express" and other publications, which ran for over 35 years.  He is not to be confused with another journalist of the same name, who was the US editor of "Melody Maker" for much of the 1970s.

Supporting paragraphs: How We Built Britain David Dimbleby
Answer: Question Time