FRANKFURT (Reuters) - The euro zone's economy is recovering but still faces a number of risks, including the fallout from Britain's vote to leave the European Union, the European Central Bank's chief economist said on Friday.

"The ongoing recovery has shown signs of strengthening," Peter Praet said in remarks prepared for a speech in London. "And the ECB is determined to continue playing its pivotal role in consolidating the upswing in the economic cycle.

"At the same time, the euro area continues to be exposed to a number of uncertainties. Some are external, including the still-fragile global recovery and the impact of the UK referendum. But some are also internal."

Among internal sources of uncertainty Praet singled out a lack of clarity over the future of the monetary union, starting from an incomplete banking union.

(Reporting By Francesco Canepa; Editing by Balazs Koranyi)