Prime Minister Theresa May has said Britain will play a "full and active role in the EU" until it leaves.
Following Brexit, Britain will remain "open" and "outward looking" and is committed to trading freely with other European countries, she said.
The prime minister is attending her first EU summit following the referendum.
Theresa May has said that the breakdown in talks for a free trade union between Canada and the EU would have no bearing on the UK's own attempts to carve out a deal with Brussels.
The prime minister said she was "disappointed" by the blocks hit by the planned CETA deal but did not believe that they reflected on the UK's likely ability to get its own trade agreement with the bloc after Brexit. "We are not seeking to replicate an existing model," she told MPs in a statement. "We will be developing our own British model."
Mrs May also announced that parliament will be given the chance to discuss the terms of Brexit in a series of debates starting within weeks.
The discussions would take place both before and after Christmas, she added.
Asked if she was undermining the UK position, she said: "You can't undermine something that doesn't exist."
The deal would set up a free trade zone between the EU and Canada - and could be an important test for the UK's Brexit negotiations.
European Commission President said an EU-Canada free trade deal would help end Canadian visa restrictions for Romanians and Bulgarians.