Three-time Grand National-winning trainer Gordon Elliott is fully cooperating with the Irish Horseracing Regulatory Board (IHRB)'s inquiry into a disputed photo allegedly displaying Elliott sitting on a dead horse, the BBC reported on Sunday. The image, which some believe to be digitally altered, appears to show Elliott making a peace gesture while sitting on a dead horse lying on its side and captioned "new work rider". "I'm aware of a photo circulating on social media," the trainer tweeted late on Saturday night. "The IHRB have been in contact with me...