A grammar school that forced out pupils unlikely to achieve high grades in their A-Levels acted illegally, an independent inquiry has found.
The policy at St Olave's school in London from 2010 to 2017 meant pupils were treated as "collateral damage", the Bromley council report said.
Excluding pupils "based on academic ability" breaches the Education Act.
The headmaster who oversaw the policy said he did not know it was illegal. The school fully accepts the findings.
'Distraught pupils crying'
Christine Whatford CBE, who conducted the inquiry, said pupils were threatened with exclusion despite suffering depression, anxiety or trauma.