Theresa May has predicted "difficult moments" ahead in Brexit negotiations but said she is optimistic she can get a deal "that is right for the UK".
Speaking at a summit in Brussels, she said she felt it could be achieved, despite the continuing deadlock over a landmark EU-Canada trade deal .
Mrs May said she had played an active role in discussions and was not "backwards in coming forwards".
It is her first EU summit since she became PM following the Brexit vote.
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At a news conference before meeting European Commission President Jean-Claude Juncker for a working lunch, Mrs May said Britain would be "a confident, outward-looking country".