“…This has resulted in 'initiative overload' (OFSTED, 2010), cynicism about the longevity and sustainability of interventions and a reluctance to invest limited time, resources and personal effort into new initiatives that are likely to be short-lived and quickly replaced (Lendrum, 2010). Furthermore, in response to practitioner demands for greater flexibility (Office for Standards in Education (OFSTED), 2007; Smith et al, 2007;Keating et al 2009;Lendrum, 2010;OFSTED, 2010), recent schoolbased interventions, such as the social and emotional aspects of learning (SEAL) programme, have emphasised a 'bottom-up' approach to implementation that encourages flexibility, experimentation and local ownership, as opposed to the more prescribed, 'top-down' approach embodied in many US-based interventions (Weare, 2010). These factors suggest that although the US literature--which has been developed over a period of 30 years--may provide a useful foundation for the understanding of implementation, it should not be seen as a permanent substitute for either national or broader, international evidence bases.…”