I had the Denny pigeons a few years ago---the year after he had an exceptional race from Pau.
The produced several reasonable pigeons mainly crossed.
These were the old pigeons---Bordeaux Cock, Classic Lad, Blue Pau lines.
I believe the dark pigeons Brian races now have some of these lines but a fair proportion of Van Hee through Fallowhill Superstar.
Brian's policy is to introduce youngsters and subject them to the type of racing he prefers. If they survive he breeds from them. If we all did that rather than putting them straight to stock we may have less rubbish.
You will not meet a more genuine couple than Brian and Thelma Denny.