Prime Minister Stephen Harper returns to Canada from Northern Ireland Tuesday without a free-trade deal with the European Union. Michael Geist, the Canada research chair in Internet and e-commerce law at the University of Ottawa, wrote in a blog post Monday that there were indications of a deal could be concluded before the end of this week's G8 summit, but “if the past few years are any indication, we can expect continued speculation without a deal for many more months to come.” Harper arrived for the G8 summit in Enniskillen, Northern Ireland, this week after visits to London, Paris and Dublin last week. Canada and the EU are negotiating the Comprehensive Economic and Trade Agreement (CETA), covering all sectors including intellectual property and foreign ownership restrictions in telecom, according to leaks from the negotiations. "It wasn't possible to do it right here and that's a pity. But the pressure of this G8 I think really got through a lot of the final issues. It's now down to the last few yards and I'm sure that it will be done," British Prime Minister David Cameron told reporters Tuesday. Geist said a deal may not happen at all as both sides “still have reasons to hold back.” Canada may also be reluctant give in on issues it could use as bargaining chips in free trade discussions surrounding the Trans Pacific Partnership, he said, while Europe’s concern is that for any concessions it makes for Canada, it must concede more to the United States as it embarks on EU-U.S. free-trade discussions.