Ours had his paed and one of her colleagues, a senior S&L therapist and an occupational therapist and also agreed to have a student observe. It was one long (2.5hrs) session that was broken down with a break for lunch. During this time Ellis was monitored by them all but without us in the room. We then went over everything that had been raised by us, his SENCO at preschool and his paed through her observations. We had to go over everything, family history, birth experience, day to day, development ect. Every areas different, some do it over a course of 3 sessions, some 1 like ours and its never guaranteed that you'll get a diagnosis there and then. I