It has been said Bowlby, J. (1988) that children need a secure base from which to explore the world. SEN practitioners also need a secure base in the knowledge that has been acquired though training and practice. Perhaps there is a need for an individual to value what they know and be confident about their knowledge. At the same time to be aware that their professionalism relies on constant updating of working practice and skills via work training and further education, and being aware that there is always something new to be learnt or shared. SEN Professionals now and in the future need to be able to draw on the professional skills that they have, but not to be dominated by them. If they are secure in what they know it could be said that this should enable them to have the confidence to challenge their own thinking and to be open to the different perspectives of other multi-agency professionals. Therefore it can be said that If SEN professionals are to challenge themselves and others through collaborative dialogue they would also need to be emotionally contained themselves Bion, W. (1962). This act requires good honest SENCo leadership and a culture where trusting relationships can be built. Harris, B. (2004) described trusting relationships as broadly taking place within three dimensions, based in conceptions of ‘emotionality'. Effectively these dimensions add up to conditions in which staff first experience a sense of their own value within an organization, in which they feel comfortable about their own abilities and needs; second that through supportive relationships within the organization they reflect upon practice, in dialogue with colleagues, and thirdly they work together to create change and improvement in the setting, or organization, confident of support. Clearly, in order to build effective and trusting relationships SEN team members would need to understand themselves and to have the confidence to share more with others. This process of cultural change is essential if multi-agency working is going to be able to provide better services to children and their families alike.