However, as the survey shows, there are little data to support successful engagement of marginalised groups, as little demographic data on who engaged was collected.
Fodd bynnag, fel y dengys yr arolwg, ychydig o ddata sydd i gefnogi ymgysylltiad llwyddiannus grwpiau ymylol, gan fod cyn lleied o ddata demograffig ar bwy a ymgysylltodd wedi'i gasglu.