Current research highlights the prevalence of potentially undetected communication difficulties, often associated with major difficulties in literacy and learning, among pupils identified as having behavioural, emotional and social difficulties (BESD). In this article, Sarah Heneker, who is a speech and language therapist working mainly with adults with learning disabilities in a Primary Care Trust in Surrey, reports on a pilot project that provided speech and language therapy to a group of pupils in a pupil referral unit (PRU). The research involved formal assessment of 11 pupils aged between five and 11 years. These assessments confirmed that ten out of the 11 pupils experienced some degree of difficulty in communication. Six of these pupils, whose significant difficulties warranted the intervention, were offered speech and language therapy for one term. All these pupils made progress in the areas targeted for intervention and gained confidence generally in their communication. The pupils who worked on word knowledge made the greatest measurable progress. Sarah Heneker reports on these and other benefits to the pupils involved and reveals that the success of her pilot project has led directly to a sustained programme of speech and language therapy input for the pupils in this PRU. This may be a response that education providers in other localities will wish to emulate.