Well this is what I learnt on the weekend when I went to a seminar about clydesdales and shires held by a leading english heavy horse jusge, Walt Bedford. He does have the markings of a clyde, the white on shires should only go up to the knees or slightly above and they usually don't have as big a blaze as that. He also has quite a broad face like a clyde whereas a shire will have a narrower (by comparison) nose. I love his colour. If he is blue roan then that indicates more of a shire as it is rare to find black in a clydesdale but very common in shire. Walt also said these days people are trying to improve the Shire breed by mixing more clyde blood in so it is likely that some of them will come out looking more like clydesdales.