In summary, it is clear from this study that chatta has a marked impact on speech and language development in children considered able and average in this area and also those for whom a specific speech, language and communication issue had been identified. There is evidence of favourable results with regard to chatta being an extremely effective discrete intervention for children in the EYFS and/or with SLCN. This study demonstrates promising support for chatta as a discrete intervention. On this basis, we would recommend further study into the widespread use of chatta in the EYFS and with children with SLCN.