Yea, Dominick had Siblings, but now only 12 of them are left. 20 of his kind were built but with BR quickly trying to modernize their railways, they turned out faulty with half steam and half diesel. Dominick and his last few siblings have this issue fixed so they're just steam powered now. 3 are kept in serect and no whereabouts of them were recorded after 1993
A full pack of them will be made C2a