Between 2013 and 2018, Mathieu has been musical director, producer, arranger, composer and vocal coach to the cast of Eastenders for BBC Children in Need. The performed medleys were:

– ‘Get Lucky Big Dance’ – 2013, covering Daft Punk’s hit in Charleston, Hip-Hop, Cabaret, Tango and Brasilian styles.
– ‘Greasenders’ – 2014, the cast sings and dances the hits of Grease The Musical.
– ‘East End meets West End’ – 2017, orchestral medley of West End hits from Oliver!, My Fair Lady, Les Misérables and Mary Poppins.
– ‘Eastenders do Disney’ – 2018, with the help of Disney‘s animation magic, the cast performs songs from Beauty and the Beast, Frozen and Aladdin to celebrate Mickey Mouse’s 90th Birthday.