Providing Individualised Therapy for Children with autism, social communication difficulties and developmental delays. The Ark Centre is a purpose-built therapy centre in Chelmsford, Essex offering individualised, early intervention therapy for pre-school age children with autism, social communication difficulties and developmental delays. Programmes are tailored to each child and devised by an experienced team of Behaviour, Speech and Language and Occupational Therapists. Each programme is mainly delivered on a one-to-one basis, following the principles of Applied Behaviour Analysis (ABA), to bring about meaningful and positive changes in children’s behaviour and well-being. All programmes are supervised by our in house BCBA qualified consultants.