CAA MODE-S Partial RIA
The CAA's summary of responses received was that only 7% indicated that it was felt that transponders would have a positive impact on safety. It's unclear to me whether that analysis was done just on the 1,549 responses that were entered directly on their website or whether it includes the 1,083 e-mailed responses. My guess is that they'll have used whichever figure is most supportive of their safety argument, so one can reasonably assume that of the 3,100 aviators who replied, fewer than 300 supported the provision of transponders for safety reasons.