What did Sir Terry Wogan die of? What BBC Radio 2 host said in unseen footage - and where to watch documentary

An unseen interview with the late Sir Terry Wogan, who was a BBC broadcasting icon, is due to be shown for the first time - over 40 years after it was filmed

Here’s what we know about the interview, and when and where you can watch it.

What is the documentary about?

The documentary shows Terry Wogan, who was then in his 40s, discussing his career and the broadcasting industry.

It was filmed by BBC South in Southampton in 1980 but only a small part of the footage was shown publicly at the time.

In the never-seen-before film he says that he believes one of the keys to his success is being an “introverted egomaniac”, but admits he fears people will get “fed up” of him due to “overexposure”.

He said: “A lot of shy people are egotists, you know, and radio gives you an opportunity to talk to yourself endlessly and show off, like I’m doing now in front of the camera, without anybody slapping your wrists and saying you’re terrible.”

He also warns the entertainers can fall into a "big hole" if they are "trying to be popular with everybody".

When and where will the documentary be shown?

BBC Radio 2 are going to broadcast large parts of the interview as part of a special documentary about Terry Wogan, to mark what would have been the 50th anniversary of when he first hosted the station’s breakfast show on 3 April 1972.

The full documentary, called Wogan: In His Own Words, will be available on BBC Sounds from Friday April 1 and will then be broadcast on Radio 2 on Sunday 3 April at 9pm.

Who was Terry Wogan?

Terry Wogan was an Irish radio and television broadcaster who worked at the BBC for most of his career, which spanned almost six decades.

He was a leading media personality in Ireland and Britain from the late 1960s right up until his death in 2016.

He was well-known for presenting the BBC’s Children in Need telethon, a role he had since the first show was broadcast in 1980 until he was forced to pull out due to his deteriorating health in 2015.

Between 1972 until 1984 and then again between 1993 and his semi-retirement in 2009, he hosted the BBC Radio 2 weekday breakfast programme, which was then called Wake Up to Wogan.

From 2010 he presented another show, Weekend Wogan, for two hours on a Sunday morning on the same channel. Again, he had to stop recording this in 2015 due to health reasons.

He was also famous for his deadpan and humorous commentating during the BBC’s coverage of the Eurovision Song Contest. This was something he did every year from 1971 to 2008, apart from 1972 and 1979, and he also hosted the contest in 1998.

In 2005, he was given British citizenship in addition to his Irish nationality and was therefore known as a Sir when he was awarded a knighthood later in the same year.

In his personal life, Terry was married to his wife Helen from 1965 until his death.

The couple had four children; Vanessa, Mark, Alan and Katherine, though Vanessa died when she was only a few weeks old in 1966. They also had five grandchildren.

What did Terry Wogan die of?

Terry Wogan died of cancer on 31 January 2016. He was 77-years-old.

After Wogan’s death, a private funeral was held for his family followed by a public memorial service, which was held on 27 September the same year.

This service was held at Westminster Abbey, and was opened by a recording of Wogan himself.

A number of Wogan’s celebrity friends attended and made speeches, including Chris Evans and Joanna Lumley. The service was broadcast live on BBC Radio 2.

Since 2016, Graham Norton has asked UK viewers to "raise a glass" for Wogan during his commentary of the Eurovision Song Contest.

A memorial statue has also been erected in Wogan’s hometown of Limerick, Ireland.