Hi Keith,
Interesting analysis. I'm guessing that a proportion of the PAW and Flarm targets might me also be Mode C or S equipped but unable to register on the strength of that equipment alone, as being "bearingless".
Combining ADS-B and PAW+ADS-B comes to about 21% of the total. Presumably the latter are NOT already included in the ADS-B column, but categorised as using PAW as a GPS source for their Mode S ES transponders?
PAW surely come out on top as being viewed the most cost effective with greatest utility for our kind of flying.
This seems to show that EC is making good inroads into UK GA. However not sure what proportion of the total number of visitors to the rally is represented by these 188 aircraft? Still lots of work to do to convince the others to take it up!