She joined CBBC continuity in September 2015, at the end of the one-off TV special Hacker's Birthday Bash: 30 Years of Children's BBC, going on to co-host the BAFTA-winning[4][5] design series The Dengineers with Mark Wright.
In April 2017, Wright left and was replaced with Joe Tracini, who Layfield continued to present with until her own departure in 2019.
[10][11][12] While some assumed the clip had context before the exchange, Hacker's puppeteer Phil Fletcher later explained that there was none, and he had just ad-libbed the line to make Layfield laugh.
In November 2023, it was announced that Layfield would be joining BBC Radio 1 in January 2024, presenting the Friday morning Early Breakfast show throughout the month.
In March 2024, it was announced that Layfield would join Radio 1 on a permanent basis from 7 April 2024, co-presenting the station's Life Hacks programme alongside Newsround's Shanequa Paris.