“…Further to this common theory of change, several strategies were identified which appear to have enhanced the delivery and impact of these interventions. These included the use of participant peers to lead, support and heighten learning [49,77,79,81,86,90,92,93,103,109,110,111,113,115,116,117], involvement of multiple levels of the ecological framework (not just addressing the individual) [51,52,53,54,55,56,58,59,60,70,72,74,81,86,91,97,98,102,117,118], developing participants into agents of change [49,52,58,60,72,81,98,117,118], using modelling and role models [49,51,…”