This is just my experience as a primary school…Our feeder high school contacts us in September for a passport of all our SEND children and those additonal children requiring extra transition. From October in Yr 6 to transition week in the June, they hold monthly coffee mornings in their SEND dept for children and parents to attend. They invite speakers to each session (such as Ed Psych) and allow the children to get to know the site over almost a full academic year.