Question: Who is best known for having hosted a variety of shows on BBC Radio 1 and has been host of "The Radio 1 Breakfast Show" since 2012, he also took over Chris Moyles, the show's longest-serving presenter to date ?

Context articles: The Chris Moyles Show
The Parody Album
Chris Moyles
Doug Walker (musician)
The Radio 1 Breakfast Show
List of The Chris Moyles Show guests
Dominic Byrne
Comedy Dave
The Shock of the Lightning
Nick Grimshaw

The Chris Moyles Show is the title given to two differing versions of a radio programme hosted by Chris Moyles, originally broadcast as The Radio 1 Breakfast Show from 5 January 2004 to 14 September 2012 before transferring almost three years later in September 2015 to the Global Radio-owned commercial radio station Radio X.
 The show is broadcast 6:30‐10:00am each weekday (originally broadcasting from 6:55‐10:00am between 2004-2007).
The Parody Album is the debut album by DJ Chris Moyles, host of "The Chris Moyles Show" on BBC Radio 1.
 It was released on 23 November 2009 and charted at number 17 in the UK Official Album Chart and has since sold over 100,000 copies.
Christopher Moyles (born 22 February 1974) is an English radio and television presenter and author, who is currently presenter of "The Chris Moyles Show" on Radio X.
 Previously he has presented "The Chris Moyles Show" on BBC Radio 1 from 2004 to 2012 and "Chris Moyles' Quiz Night" between 2009 and 2012 on Channel 4.
Doug Walker is a Manchester-based singer-songwriter.
 After years of getting nowhere with his musical career, his planned self-released debut single, "The Mystery" was played by BBC Radio 1 DJ Chris Moyles after Walker turned up outside the Radio 1 studio on 28 August 2007 at 5.30am.
 He gave a copy of the recording to Moyles as he arrived for work.
 It was played at 7.20am, and the radio station was inundated with emails and SMS texts, resulting in Moyles playing the song seven more times that week.
 As a result Walker met with eleven record labels and signed with Warner Bros.
 Records on 12 October 2007.
The Radio 1 Breakfast Show is the flagship show on BBC Radio 1.
 Since 24 September 2012 it has been hosted by Nick Grimshaw, who took over from Chris Moyles, the show's longest-serving presenter to date.
The Chris Moyles Show was a BBC Radio 1 breakfast show in the United Kingdom, presented by Chris Moyles.
 It aired between 5 January 2004 and 14 September 2012.
Dominic Anthony Byrne (born 10 November 1972) is a newsreader and presenter.
 He currently works on the Chris Moyles Breakfast show on Radio X, having previously worked as the newsreader for Capital FM on the Capital FM Breakfast Show.
 Prior to this he had worked with the BBC from 1997 to 2012, most notably as part of the on-air team on "The Chris Moyles Show" on BBC Radio 1 from 2004 to 2012, working as the newsreader and contributing to the show's zoo format.
 He also worked as a newsreader elsewhere on Radio 1, and presented on the BBC News Channel.
 He also runs his own voice training business called Open Mouth Productions.
 He returned to the new format of "The Chris Moyles Show" on Radio X in 2015, reading the news.
David Lloyd Vitty (born 24 April 1974 in Hong Kong) is a radio presenter working in the UK.
 He worked alongside Chris Moyles at BBC Radio 1, having originally been a broadcast assistant on Moyles' early morning show.
 He became the show's head writer and 'Director of Comedy' and moved with Moyles to the drivetime slot, and then to "The Radio 1 Breakfast Show", during which time the programme was known as "The Chris Moyles Show".
 In total, he spent 14 years from 1998-2012 working alongside Moyles.
"The Shock of the Lightning" is a song by English rock band Oasis and is the fourth track from the band's seventh studio album, "Dig Out Your Soul".
 The song was released as the first single from the album on 29 September 2008.
 It received its first airplay on 15 August 2008 on multiple UK and Irish radio stations including the Ian Dempsey Breakfast show on Today FM in Ireland, BBC 6 Music by Shaun Keaveny, and by Chris Moyles on BBC Radio 1.
 Chris was joined by Noel Gallagher on 15 August 2008.
Nicholas Peter Andrew Grimshaw (born 14 August 1984) is an English television and radio presenter.
 He is best known for having hosted a variety of shows on BBC Radio 1 and has been host of "The Radio 1 Breakfast Show" since 2012.
 He is also known for his Channel 4 roles in T4 and "The Album Chart Show".
 In 2015, he was a judge on the twelfth series of "The X Factor".