The First Season Sire (FSS) class of 2018 based in the UK, Ireland and France that I have followed in this research include:-
Alhebayeb, Australia, Battle Of Marengo, Bungle Inthejungle, Charm Spirit, Coach House, Gale Force Ten, Garswood, Gregorian, Heeraat, Kingman, Mukhadram, No Nay Never, Olympic Glory, Sea The Moon, Slade Power, Toronado, War Command
Average rating of each sire's progeny that has run is plotted against the average mare quality of those runners measured by the mares' own racecourse ratings. Unraced mares and those with two or less runs are rated with the average of the rest of the mares for a particular sire. Methodologies are in place to record ratings for overseas (defined as outside UK & Ireland) runners to maintain consistency as much as possible. The intention is to follow each FSS class for three crops over two or three years to aid identification of those sires that are over/under performing given the quality of mare put in front of them.
You can see the progress of the 2018 class under the tabs attached to this page