[2] Edmondson was a CBBC continuity presenter from 2004 to 2006, prior to which, in 2002, he was a roving reporter for Channel 4's Richard & Judy.
[6][7] In May 2010, Edmondson presented highlights from The Great Escape Festival[8] and the Topman CTRL Student Tour[9] on Channel 4.
On 27 June 2016, it was announced that Edmondson would co-host The Xtra Factor Live alongside Rylan Clark-Neal on ITV2.
[13] On 8 January 2010, Edmondson joined BBC Radio 1, and appeared every Friday on Fearne Cotton's show to report on entertainment news and showbiz gossip.
On 10 April 2018, it was announced that Edmondson and Mollie King would co-present a new afternoon show for BBC Radio 1 beginning in June on Fridays, Saturdays and Sundays.
In 2018, Edmondson hosted a BBC radio podcast programme in which he and his episode co-hosts, beginning with Amelia Dimoldenberg and Nina Nesbitt, deliberately vandalised Wikipedia to see how long the vandalism would last.
[19] He appeared in the music video for the song "Make Peace Not War" by British grime artist Skepta.