The Collegiate grammar school
Since the tick boxes were abolished last year, secondary schools have to use grades from primary schools to determine intake.
Faced with a number of children with the same grade competing for the last few places, the Collegiate governors tried unsuccessfully to get more details on pupils from the Department of Education and the local authority, the Western Education and Libraries Board.
The school governors said: "Only when we had exhausted all these possible means of acquiring further information did we finally, and very reluctantly, find ourselves having to set non-academic tiebreakers, distasteful to us. We felt it was the only means of giving everyone an equal chance of being selected."