We made it clear from day 1 in reception that the 11+ was our aim
I think that about a third of both ds's year groups left and didn't continue to year 8 but several children joined both year groups for years 7 & 8 - a mix of boys who failed to get into their chosen school for year 7 and boys whose parents decided indie was the route for them and the indies here tend to start in yr 9. Certainly each year a couple of boys who didn't get their expected 11+ results stayed on.
The school were always proud of their 11+ results and the boys were suitably lauded at speech day along with the yr8 leavers. All leavers, wherever their destination, are listed on the leavers board hung in the school.