Mariatu is eleven years old and attends Trinity Catholic School in Nottingham. She studies cello with Ben Davies, and piano with Fiona Harris at Primary Royal Academy of Music.
She has Grade 8 distinction on the cello and is working towards Grade 7 piano. She has performed with the Kanneh-Masons in a series of concerts around the U.K. and in Antigua and Barbuda and has forthcoming concert tours with the Kanneh-Masons in Antigua and Barbuda, and Australia.
Mariatu has appeared on several television and radio programmes with her siblings, including BBC 1 The One Show and the BBC4 documentary, Young, Gifted and Classical, CBS Sunday Morning (USA), ITV Royal Variety Performance, and the Imagine documentary for BBC1, This House is Full of Music. She has also recorded for the Decca Classics album, Carnival.