Boris Johnson on Brexit negotiations with the EU
23 August 2019 Last updated at 16:28 BST
The prime minister said "the mood music is good" following talks with EU leaders, but preparations for no deal continue.
Mr Johnson insists the backstop - part of the withdrawal agreement reached by his predecessor Theresa May and the EU, but not ratified by Parliament - must be ditched if a new deal with Brussels is to be reached before then.
Brexit is due to happen on 31 October.
Read more: Boris Johnson: New deal with EU won't be a cinch