I hope I'm just missing something obvious, but here goes:
DS has taken Bucks STTS and Berks 11+ and we're shuffling the CAF as a result. BGS requires '121' but refers to 11+ in its admissions policy. Is that an 'STTS' 121 or a 11+ 121?
Assuming it's an STTS 121, and anything 'over' an STTS 121 is just 'numerical packing material' and not relevant, what of the 'top down' process of selection?
STTS is the 11 plus score. There is no "top down process", it is on distance once a pupil qualifies. (I think STTS stands for Standardised Transfer Test Score, or something like that)