She starred in the children's series Sadie J, The Evermoor Chronicles, and presented the CBBC magazine show Friday Download.
In 2011 she began presenting the CBBC entertainment programme Friday Download alongside Tyger Drew-Honey, Cel Spellman, Richard Wisker, Dionne Bromfield and Aidan Davis.
In April 2014 it was announced that Lock had been cast as Bella in the Disney miniseries Evermoor alongside Naomi Sequeira, Jordan Loughran, George Sear and Georgie Farmer.
[5][6] In March 2015 it was announced that the miniseries had been given a full series order under the working title of The Evermoor Chronicles,[7] with Lock set to reprise her role as Bella.
[8] In April 2015 it was announced that Lock would co-present Michel Roux Jr's upcoming Disney reality children's cooking competition First Class Chefs alongside Evermoor co-star Finney Cassidy.