Parents of disabled children are particularly concerned with ensuring they are well looked after.
If a child is mentally disabled then they are not in a position to make decisions for themselves. Alternatively, a child who is physically disabled will require someone to make decisions for them until they reach the age of 18, or whatever age you feel is more appropriate (called the age of attainment)
In addition there may be existing benefits that may be under threat because of means testing.
A disabled child’s trust: