In Harmony Lambeth is one of three projects offering free, intensive music training to young children in underprivileged parts of the country.
See how the children are getting on, one month in.
Continuing our series looking at the work of the Music Manifesto over the last five years, we catch up with MMPAG member John Witchell.
We visit the Twickenham school to see how they spent the first ever National Sing Up Day.