The Food Standards Agency has dismissed claims that the horse drug 'bute' may have entered the human food chain in horsemeat.
The FSA said horses treated with the drug phenylbutazone are "not allowed to enter the food chain".
The FSA statement added: "During the recent horsemeat incident the Food Safety Authority of Ireland checked for the presence of phenylbutazone and the samples came back negative."
Shadow Environment Secretary Mary Creagh earlier expressed fears that the drug may have entered the food chain through horsemeat slaughtered in UK abattoirs
More top news
A dry night ahead, with any showers fading away.
Global warming and a strong El Nino weather system has sparked mass coral bleaching, experts warn.
Much of the commentary online focused on Chris Evan's co-host and former Friend's actor Matt LeBlanc.