Couldn't someone work out the averages so protected edr race results are excluded from riders's averages and then probably 2nd strings against 2nd strings and heat leader against heat leader ........ would be interesting what it throws up. So it would only be reserves against 2nd strings and heat leaders, 2nd strings against heat leaders, heat leaders v 2nd strings and reserves.
I may be way out but it would be a comparison between riders of different quality ........