Hi Steve,I do have singular strains,as i said earlier,they are Barker/Hansenne,I have had this family for 50 yrs.they have won from all major channel races,one was my 2nd bird home from the tarbes smash this year.765 ml.They are all old English strains ( with the exception of one family-Jan Aarden. )I have single strain of Kenyon.A single strain of Ken Hine,these are made up of Biss,Titmuss & Fear Bros.The Fear Bros.birds came to Ken from Biss! I also have a blend of all families together,because they win.