(ShareCast News) - Events and public relations communications company UBM said it was still in talks on the sale of its PR Newswire unit.In a trading update for the full year, the company said there was "no certainty" that discussions announced in September with a "number of parties" would result in a deal.Elsewhere, the company said it continued to perform in line with expectations during the period.It said large events continue to drive performance while PR Newswire and other marketing services performed in line with expectations.The outlook for the profitability of the group in 2015 remains unchanged, UBM said.