This is the slightly edited text of the speech to party conference on Sunday 18th September, moving the motion with the same title. The text of the motion can be seen here.
We believe in social mobility, but social mobility is more than simply plucking a few from disadvantaged backgrounds, by unreliable assessment and unfair procedures, at the age of 11.
In any case, all-embracing division at age 11 sends a damaging message about how we value each young person.
Actually, we believe in more than social mobility; we want even people who choose to stay in particular social groups to be better educated and better off. Not only is that good for them, it is necessary for our economy.
Gone are the days when unqualified youngsters from secondary modern schools could walk into a good job.
Gone, we hope are the days when an educated elite takes charge of everything and the rest are merely simple-minded servants.
Likewise we need more education for our society and our democracy; local and national governments and voluntary organisations have more complicated decisions to make, requiring greater understanding and participation on the part of all our people.