The educational inclusion of pupils with special or additional educational needs is being promoted internationally. One would expect that professionals for whom the group identity as 'special professional' is both important and perceived as being under threat, would only be supportive of inclusion if it could be orchestrated in a way which fosters that identity. This article provides a review of the research literature concerning social group identification and perceived threat with particular reference to derogation of the out-group, perception of group structure and in-group affirming behaviour. This article provides the context for findings from a scale about social identity (devised for this research) concerning an email group oriented to professionals working with children with special needs (n= 105). The survey identified three social identity factors (perceived typicality, public reference to the group and identification with prototypical group members). High (compared with low) email group message senders were less likely to see themselves as typical of workers in the field but more likely to identify with SEN as a group. The work has conceptual interest in that it supports recent theorizing in social identity in an area for which there is a need for a greater variety of studies having good ecological validity. The work also has considerable relevance as an example of the possible application of psychological theories to the special needs context of fostering effective change concerning inclusion and integration.