World Trade Organisation members yesterday formally endorsed WTO panel and appeals body rulings against the European Union's ban on hormone-treated beef which was found not to be based on scientific evidence. The EU has until the next meeting of the WTO's dispute settlement body on March 13 to explain how it plans to implement the rulings but EU officials have already said they intend to carry out another scientific risk study to support keeping the ban. The US and Canada, which brought the WTO challenge, said yesterday the ban should be lifted immediately.