It looks to me as though they are not aware of the 24 places mentioned here...
The first 80% of places (96) will be allocated in rank order from the order of merit (i.e.
rank by academic score) following the 11+ examination, to girls living at a permanent
address within a 12.5 miles radius (measured in a straight line) of the School. All
straight line distances are calculated electronically by the Local Authority using data
provided jointly by the Post Office and Ordnance Survey. The data is used to plot
the co-ordinates of each individual property and school and provides address points
between which straight line distance is measured. Distances are to three decimal
places in the first instance.
The next 20% of places (24) will be allocated in rank order from the order of merit
(i.e. rank by academic score) to girls irrespective of distance to the School.