I don’t think DS1 falls into any one package. He has complex physical, medical, psychological and developmental needs.
He has complex physical disabilities - has a whole host of equipment, house adaptations, etc. Needs and has physio, OT, SALT, swimming (hydro/aquatherapy but in normal temp pool for medical reasons) and rebound therapy.
He also falls under the sensory impairment strand - Although he isn’t Deaf and isn’t registered SSI, he has hearing and vision impairments. He receives ToD, QTVI and QHS input.
Profound and multiple learning difficulties - he doesn’t have PMLD because he doesn’t have an LD. But he does have the significant communication difficulties, physical disability, sensory impairment, sensory processing differences, and medical needs mentioned. The LA consulted PMLD schools because in many ways he presents in the same ways as PMLD cohorts.
DS1 has significant executive functioning difficulties. (Although I’m not sure the government understands the term, because you can have EF difficulties and not have severe learning difficulties.) DS1 has a life-long speech and language disorder and has difficulties with speech, language and communication, executive function, social and emotional, motor and sensory development.
He also has elements of the complex executive function and communication profile because in addition to the last paragraph, he can display challenging behaviour and needs support with personal care needs, nutrition and physical development.
At differing points he displays both internalised and externalised presentations of the social emotional development profiles. Has SALT, OT, CP sessions and emotional literacy support. He can cycle from internalised to externalised and back rapidly.