www.speechlanguageconsultancy.co.uk. Speech & Language Consultancy is an independent speech and language therapy practice serving children and their families living in East Suffolk and Essex. SLC offers a variety of speech and language therapy services for children including assessment, advice and therapy for children with a range of speech, language, communication and eating and drinking difficulties. For education and childcare providers the practice offers a range of training packages and support to set up language stimulation groups.